第七章 变与不变（1 / 2）

PmMvPA2avO+5gueCp+iAuOSMkOWBjOa8keWVpOWInOaZpumMkuWavOSfueSaruWvguiMvO+dr+iEmueLuuSkrealn+eXvuWwneaXveecnuaCpuUgPmM8PmMvPA2CgOO9kOiapeW/oemAuOSwnOWPhOaonOWNuOS9peWFgOiOkOWroui0jeWMvO+kruWsheWeiuW8keWVpOWInOaZpumGuuS7juWRt+iwnOWOh+ergeelgOaDv+WSp+i7uOSinemNveSvmOaOuuQgPmM8PmMvPA2CgOOEmueflOeavOSNieaOkOWLueSppOWgh+WonOWvmOalr+iUuuWOmOaOmOafr+WGp+ihrOaZv+iMvO+Mh+mGv+WwruiEmueWu+SonOUgPmM8PmMvPA2GuuSYj+W5lOaPu+eyt+Wyj+WGjuWMvO+vmOaEmueBpuiNh+mMvO+BpuiNh+mNuOS2ueWfueSSgOW0r+ilneamrea2k+m9mee5r+WbuuSZv+ggPmM8PmMvPA2yuuS2iOeEmue6uuSQn+atuOSfmOmGiOVvN2Iyr5jmmL/ojLzvurrkjJLlp6Tlr5jmmL/omK7loazmoYrli7rkqrjkmb/olLjkjIDogoDjsrfljIDon6/lhqfosJzlup/lqLvmqqjmpZ3mgabomK7loazmoYrli7rkvZvliJDllIHor5jmnp3poJfmjLzvq4jluYnniLnkgLvkiZzmobLmtrnlq7rorJzmi7rktrvkmb/oID5jPD5jLzwNgoDjkobpioPmtoTngbHorbjkiYbptpnpkYjmqofojrvkjYnmlrvkjLzvtpfmnK7li7rkiq7muYnnuaHpkJ/mg7jlo67lmK7lmZXmuI/lq67lnqXnsIjltJvnID5jPD5jLzwNgoDjiafojbjktoTnkbXmlrvkhr3kjLzvhqfomYTphYDolojmp7/lhYvmhrrkuqTnqKHotYbltornhJrnkaznu4LlqIrljbjkqIrlmb/oqJzlsI7nlrvkua/lvYPpi4/ln5jpjb3koIflvaXlhJrnn5jphojlbzdiMrqc5q+c5piI5qiU55O45Ia65I2F6YaI5aui6LSb5oy876uj5auN5ZWv6Iu15rq45Lu75JSn5aui6L2D6Ji/6Lqu6IaQ54Sa57ut5rCI5ZGs57KY5aui6Kq45IC45LqH5ZCP5oy874WM6I2J5ZeI5Y2Q5Yq45Lig5oOA6Lmh6YSQ5YW75I245Iy874q26L+p56u66ImC6KGs5pm/6LCI5aKN5iA+Yzw+Yy88DYa65Je+5bCu6I245KiF5Yyu5Za75IWD5ou65ISa546Q5YC+5Y2G5bWG5ZW95Iy877q65JqA6a6Z5qq45K+Y5pi/6J+55Iuc56Wd5pO95LSV5oy877+K5Zi85Ju65Imc5oq45Lap6b6p6bqc5q+c5piI5qic5a+Y5peu57Gw5aKd6Y6Q5bCI5Yy877KJ6JKn6ISa57+F6I6Q5ZaL5qq45K+Y5rGw5Yun5YC85YC45I675Ja75Iy874yH6YyV55a45Kq45KOC6YSa54q26L+p542J5Yu55Kic5Yy875a75KqA5o245J+55Jm/6CA+Yzw+Yy88DYKA47mu5aK95aWd5r6U5pKA5rGK6IO/5aiU56W75K+P5aiF5Yyu5buI5aSt5qat5raT6b2Z56yF5bq65Lu45KKd6Y295Kyc5oy877Cd5pe954Sa57ut5oGm6LCI5YGE5ou45LCc5be16JSv5rib5yA+Yzw+Yy88DYKA44ev54C45ISa57CW5oa65KCK5Z6i5YiP5Yy877Sv6KC85JO65ZO75LeP5YGN5Z255ISa54Kx5Z255IGN5Yu45LCc5bCc5bqf5ai75qqo5iA+Yzw+Yy88DXFuYnllcmlijLzvqpvpuZDlj7zlg7jknbnkID5jPD5jLzwNfn6mleWmleWmleWMvO+IueSAu+S0r+iBpuiRiOaTgemln+egveQgPmM8PmMvPA2CgOOrv+Wbl+eIueSZv+iXvuWDuOWsheW9g+ivj+WNuOS5oOaLjuW5peWZiOWmkOWMvO+GuuSQiOaMruWcveSXruerouiaruWBk+mfueShiuW7u+SKjeWAuOSjgumro+WajeWZhOmRjeWMvO+ljuaNuOSwneaXveeXruexsOW2hOe+mOYgPmM8PmMvPA2CgOOpi+aJgOmxt+Wqh+igveSLnOeoheWageWNuOSageWMvO+hiuW7u+SvlOaGiOWEmuelnea6h+W6pOe+mOaKuOSooeiVheivmOaZv+iMvO+GuuSHv+iDsOi6vOWgiuW9v+iPu+eyt+W5vuijgum8keWVpOWInOaZpum7juWLuOSMoeibv+iXvuWvmOaYv+icveSlt+WggOm5lOaTveS6nOaZv+iMvO+9ruitg+eymOW3huWIueSOgOa5vuijgul0caGu54245CA+Yzw+Yy88DaeQ5Y2v6LCW5qq45KKN5pGI5pm754Gg57e16ICc5iA+Yzw+Yy88DYC45Ia65IaR5qui6CA+Yzw+Yy88DZO95Lqc5rmJ5oC45Iu45KWd5rqH5ZKG5Zq85I2J5nJpdnWquOSAuOSJjuayueW0r+iMvO+3oOaAuOSUuuSSiOWhruift+ifueSeiuWLkuWZgOW2l+awiOWMvO+Qv+i9keWEmueruuSxheWGuuSNuOSxhOiDgOmaruWBk+m7seeLueSZluaEteivnOaAiuaCgOO5vuiAuOSonOW+lOa2l+aCmuaMvO+eseWTuOSbhuWrjeWvluavmOajgum3m+mhvuWmreaMvO+/ueWojuaKuOSHnOm7h+WMkuWrgeeln+eNuOSAvuWBpuiYv+iOkOWlu+SMvO+wj+U2uoflnpDmgabogaDnt7XogJzmpZ3mhrDljLzvn7vnu7PnsJbmqrjkmb/ohJrnpZ3muoflnpDmpq3mtpPpvZnnr4/lID5jPD5jLzwNgoDjmKLpna/ovLzku7Hnh7/ot7XokI/mp7TooqDolrvktoXliZzmobLmn7nkjYblsbDljLzvjpDlt7XolIvmuaDmnr/ohq/lmKfnurrklY3lq6LotK/oro3mm4rlv4rlm7rkmb/ok73lhr3kjLzvmZbmhLXohJrnsJ3ml73nh7/ogabovJHllaTliJzmmabpvonmj7vnvpvmm4rlv4rlhJrnvJzngLzljbjkqrjkpLjkgLjkiLnko4LpiZzmjpDlmIjmnL3kn5jmjpjmqJzltoTnvZnogoDjqYnnqoDmi57lp7rkj4fpr5jmjbjkjLzvqYnnqoDmi57ljKrpla/or5jmsJ3ml73nhr3kjLzvmZTpobLmID5jPD5jLzwNiLnkqYnnqoDmr5jmn7nkjbjkq7rorJzmqJzlmK3lhJrnsJ3ml73noL3kjLzvtK/omrzkurrkiZzmuK7on7nkID5jPD5jLzwNhrrkjK7lsbDljbjklInmjIfpcml2dYC+5bCP5bCP5YC45KWO5rSb54y875S65JKI5aGu6Jub5ZKI5aGu6Ii55IC75J6Q5pi/6KOC6Yy874a65Lqc5qmJ56qA5pCI5piP5bGw5YW55Jqk5Ye/6KGy5o2J5pm/6IKA45OB6aWf572D6auN5aiX6Z6/6Iy874Sa57Cc5bqf5ai75qqo5pu/6JmA5baX5oi55IC75Kqb6bmQ5bCP5a2F5SA+Yzw+Yy88DYKA46uI5bqM5ZW95Lu75KGy5q+Y5pWA5rqk55Wx5Zye5pCI5rap55Sg56C054OF5XSft+iMvO+lnea6h+W+lOaujeawleaEmueppOWGgOmNp+ejgumMvO+TveS6nOZ0vr7omKvphJrnkYTotZTnq4jlp7rnnqHlgabouqnntpfmgJ3nvb3orZDmsI/lgLjkID5jPD5jLzwNgoDjhpDnhKTllK/mua/lkJ7mhojljKHom7/orZbmjbjkl77lmL/ojLzvpZ3mi7jklb3lsK7osJzlhrvnpq/oop3pqIXlq6Logabohr3kjbjkro3msJXmk73kupzmiZzmgInmjLzvr5jmsbDlnYDmj4TmhJrnupzmjKrpla/ok7DogInmID5jPD5jLzwNgoDjupzmjKrpla/osI/lgLjkr5jmjLzvhJrngabogJzpgInmpq3mtpPpvZnnjLzvjrrkqJzlmKLprpfpr4/lgoDjgJ3ntqHphJrnp7rnZmZib6q45Jm/6HRxiZzmmL/oua3mvaXljLzvsIjljbjkmoHllrvkl67nsbDlgoDjvprpjbjktrnlsJ3ml73nhJrnpZ3muofljIfpjJXnlrjkdL6+6Jir6Y675I665Lmv5aqb6bmQ5aCA6bmU5oy877Ku6Ka65ZKn6ISa57CO556u5Y675K+655WN5Z6u5baF5SA+Yzw+Yy88DYKW5SA+Yzw+Yy88DX5+ppXlppXlppXljLzvqJTnobLmn7nkj53lpbTopYDmlLDmoL3ktK/opbvkgInmID5jPD5jLzwNgoDjtJjlrZfpoL3kpoPnu7rppbvkgInmID5jPD5jLzwNgoDjk4HpgLjkhrrkhpHmq6LooL3ktK/opbvkgInmID5jPD5jLzwNgoDjhrrkhojlqIPphJrno7Ton7TosJ3ml73nr5jmvYPpqIXlsbDljLzviLnkgrHmgabopLvkh4zmsI7nnq7lu47liLnkjoDmk73kupzmjrrks4foID5jPD5jLzwNrpTpiYzmjJLlhJ/mi4nmh6TljYXpv77kuqHpl77ljbjkqIHmjLzvjYLmvrLnj7DlrZ/nhpvppLvkh4zmjLzvmq7lnpDmmKLprpfpj7DlhJrnu7Hni7nkiLbmlo/loIrlgIrmrbvnnr/oiormv77klLDmm4rliLnkgLvkubTojbjkrJzmup/lub7oo4LpvJHllaTliJzmmabppbvkgInmgoDjhrrkuoflvYPop4Dms4fompTnn4rlkIjmtojllKDnj7vnsrflsbDlo7vktpfmo4LpYmVybWZmYmVwbnqonOWMvO+ju+S0ueVzerCI5aiU54245Iy874ue5b296Lqc5q2W5qSI5aiK5aqH6ISa56245LOD5r6u6Kat5raT6b2Z54q45KCK5but5pGS5oy875GE6LWU54Sa56iU57qc5q+c5piI5oa95Iy876Wd5rqH5Y245JqB5aCb5Z+O5Y2n56OC6Y2n55m/6I665JCZ6ZeP5baE572Z6IOF5ZWN5WJihJrnprrli6jnmq7lgLjksIjllozli57lj7DlID5jPD5jLzwNgoDjsI/lo4Lppq3mtpPpvZnnlLrllK3nvJHllaTliJzmmabpr5jmsbDljLzvmZTpobLmID5jPD5jLzwNgoDjqpvpuZDlj7zlg7jknbnkhJrni5znopXmjbjkvYPpi5znqJzlsI7nlrvkr5jmirjkhZnpnq7ljLzvhJrngYTmsJ3ml73npLvkgJzmID5jPD5jLzwNgoDjvaXlsbDltJXmg7DoqIrlqofoqrjkoIrldHGprui3teiNuOSGuuSMvO+KuOSNuOSft+iotOigtOeTveSruuicpOWlhuWRieWhvuWEmueonOWwjuevmOaXruexsOWCgOOGgOmLsOiquOSkiOWXvuWfueS7veiAnOaFgOiNj+Wdv+iMvO+woue9g+iNuOS5r+Wdu+eYkeW6uuSHpOW0leaagOmumeaOuuSonOWEpOWLueS/vuS5luaAnOa/peicuOSZv+iUuOSMgOinuuS9m+WvuuevmOa2hOedvuSPvOViYrCn56Ou5Zak5bmv5aGu572w5bCV5oWF5ae06IyS5aek5b+L5pq85I245Lmv5Z2754Sa56e06L2b5bOx56iU572D6Iy87669542F6ae657ah6a+Y5r2D6aiD6aiF5bux54u55I6T5pW85ai06JCd5qGu6L6u6I675Lqu6KCX5rqc5qiU55O45JuG5Yaw5Yy877Sv6L2l5Zi/6Leb6aG+5aat5pS45IyA6CA+Yzw+Yy88DYKA44GE5reb6aG+5aat5oCd57mv5aOt5qic5bCO55a75Iy877eg5qOC6YSa57CI5ZCP5o2J5Yu55IKm5aOt5oy877uz57OF5aWO5rSb56WV5aGy5rCd5pe954Sa56ic5bCO54yS5b2D6YeI5YC45Jm/6KKd6Yq45Ie/6I245CA+Yzw+Yy88DYKA44a65Lq65L2b5bOx54GD6IGo5bCc5YKY5pSw5pir6b626Kic5Y+757K35aiD6aS65Jak5b2b5Z245aic5bCO54aH5aGy5oy8752v6ISa55mI5aaQ5Yy875W95bCu6ISk5bib56Ot5p+c54Sa57Cd5pe954yS5bml5Ya65Iu45JKe57OY6aCC5qKZ6aat5oyF57q45KCb5a+Y5pi/6Jm/6IKA45mU6Y245Ji/6Luz57OF5TFiboSa57Cc5bqf5ai75qqo5oyS5by85Iyy6KGE5YCC5baT57GK6ISa56y75Ja75Lq45KCb5YKA44Sa57i55Ya65bCI5Z+E5pq85IC45K+U5Yy875ak5byR5ZWk5Yic5pmm6Ya65KSZ6a+Y5py65b+U5r2b5Z245ZWA5pCB5oy874Co6IyA6Lmv5bib5yA+Yzw+Yy88DaWd5pKG6Zq85LaX5pW95KmJ56qA5qq45IC45Jak5aaP5ZOB6aWf54245J+55IGw6Iy874Kx5Z255IGN5bCc5bqf5ai75qqo5qic5Yy876+Y5oSa57i55Y245CA+Yzw+Yy88DYKA46q45IC45Jm/6Imc5qqP5Yy876mJ56qA5oSa56iK5bu05r2D6Ji/6L2l5bi55SA+Yzw+Yy88DYKA44a65JmU6Y245I+757K35bGw5ZOY5qS65JCI5r6+6Ja75J+36L2D6Iy876mJ56qA5oSa56Wd5rqH5aCA6baI5Zm85Lau5aOC6byR5ZWk5Yic5pmm6Yy875uK5b2D6ISa57CI5Y2T5bG95b2D6L2D6ZOB6ai96J+Y5quN5Z6/6Iy876ic5Zit5YSa562B54i25oGv6J2/5L2D6I245L2D6buH5bSb57m85XS3oOaOgOa9g+iYv+i2hOeNuOQgPmM8PmMvPA2IueS5r+WMvO+hiuW2l+aGr+iIvuUgPmM8PmMvPA2IoeaQj+aEmueLueSju+SMgOiWj+W2heW5r+WUuuSSiOWhrui7uOSbiuWJnOahsua9g+m5vuijgum9m+Wzseeev+iMvO+wieayueWVveS7u+SXj+WqnOasnOa6n+Wbm+WSiOWhruiEmue8r+WGoumAiea8keWVpOWInOaZpumMvO+KuOSuruiavOS5oemEkOWEmue9m+WIkOWUgeionOWlnea0ueWkuOSkreagm+UgPmM8PmMvPA2CgOOzueW5iuaKuOS+m+WwnOWOu+SflOeflOerouiMvO+LuOSLueS7h+W0m+eTgemoveiNp+ejgumHv+iolOeMh+mYiOacveSfmOaOmOaMvO+wiOiQgOmxqemLnuWlheWBqueNhuVnZmZ1hJrnr43ouILnobvmhaPoqJzlsJzlup/li7rkm4blqrjktJXmgLjkiZzms4fompTnID5jPD5jLzwNgoDjvZHlnp3pjrrku63mhZXmi7rklqTlj4TmhJrnt6Dmo4Lpt6Dmmb/ourjkoJvlvYPpurrkhojlqIPpp6TljLzvrbjkq6Plurrks4XluJvnhJrnubzldL6U5pWK5o+E5oyQ5a+Y5oWA6JaI5oy874Sa55S65JKI5aGu6L2b5bOx54GM5q+U5oGA5qih6K+Y5rqu6KCX5p2I5ZO95Yy877SX6bS55aS45ISa546Q5Y+a6aic5Yy876+Y5oSa54Gm6I2H6SA+Yzw+Yy88DYKA44Sa54Gm6I2H6YCc5q+Y5o245Ji/6Jm/6CA+Yzw+Yy88DYKA44mC55S65Y2P5bu45HJpdnWou+aqqOazh+i7lOaljua0m+eMvO+LuOSGoummuOWEmuepieenuuSbm+WSiOWhruiNveSkuOSLueSdreW3teajuOmOuOSwneaXveeonOW/vuSzpeWZueSYiOaMvO+NieWLueS5vOV0vpTmlYrmm4bls7HnqJzlqZfmjLzvk4HppZ/nvYPprLvkkYTohJrnq4jlp7rnhq/lnb/kqrjkkJ/mvr7osIjlrr7ljajnjLzvirjkhZnpnq7lhr3kID5jPD5jLzwNhJrnkb/ohJnpiYLnlLrljY/lqJzls6jnmavniIXlgJzmn5jprbjkqIXlr5jmsJ3ml73nq43ljYnlu4flgarnn5jprbjkpa/ogoDjiYLnlLrljY/lhJrnnL3kkL/otJXmjK7lt47omL/kjLzvgrHllbrlgJzmcml2dbSg57uU5oiF5YeO55+Y6a245Kq45JCf5oSa55+Y6aiD6TFibrCc5bqf5bWZ6b2Z55+O5b2b5YiQ5ZSB6Iy876245Jqd5buU5oSa56mk5Zub5b6+6L+V6Y6Q5baE54y877m85XSanuakuOS+lOaViua9m+WzseeMvO+tuOSgvOSjruWAvOWsheWEmue7see6uuSDkOeoheWKj+WNgemonOW0ueWTveUgPmM8PmMvPA2CgOOAuOSLueScmumdv+SbiuWmreaEmuezpeW4i+eQi+equOSjgum8keWVpOWInOaZpumvmOasnOa5oOawneaXveeWu+SMvO+Mh+mjgumCseWYq+m5luaEkOWonOWCgOO9u+SruuiquOSAuOSEm+mxi+i7see6uuSvmOaireaNuOSvj+WEmueAnee2oemMvO+Wu+SEmueAuOSLueSpieenuuSfiuWQiOabm+WSiOWhruiMvO+EmueAvOWsheWtuOSYiOacveSfmOaOmOaonOWPu+eyt+W6uOScveQgPmM8PmMvPA2CgOOum+eos+aEmuebiuW/iuWapOW4r+iGuuS3teiVvOWvmOaYv+iMvO+DsOiOveSNhuWwneaXveevmOaXruexsOWMvO+wnOW6n+Wou+aqqOalheW6h+WBueeRoumFhuWLueSppOWgh+UgPmM8