他在城市进化论“<a href="https://weibo.cn/sinaurl?u=http%3A%2F%2Fmp.weixin.qq.com%2Fs%3F__biz%3DMzg2MjA5Mjc0OA%3D%3D%26amp%3Bmid%3D2247548191%26amp%3Bidx%3D1%26amp%3Bsn%3D19e900213aa1b4eaf4dfa858d493040b%26amp%3Bchksm%3Dce0f51bcf978d8aad3d7b889a1862d792d1e2e97ac2bc47267f76b26d4e4c20fd6fa6f242f54%26amp%3Bscene%3D21%23wechat_redirect" target="_blank"><em>大家的城市公开课</em></a>”第二期上提到，“我觉得我们不需要让一个城市去抵御10万年一遇的洪水、暴雨、干旱，也不需要修到应对万年一遇的程度，能应对百年一遇就可以了。”

erzhongguoshizhongjiandingfengxingziweifangyudehezhanlve，shiweiyichengnuobushouxianshiyonghewuqi、buduiwuhewuqiguojiahewuhewuqiqushiyonghewuqidehewuqiguojia，shizhongjiangheliliangweichizaiguojiaanquanxuyaodezuidishuiping。而(er)中(zhong)国(guo)始(shi)终(zhong)坚(jian)定(ding)奉(feng)行(xing)自(zi)卫(wei)防(fang)御(yu)的(de)核(he)战(zhan)略(lve)，(，)是(shi)唯(wei)一(yi)承(cheng)诺(nuo)不(bu)首(shou)先(xian)使(shi)用(yong)核(he)武(wu)器(qi)、(、)不(bu)对(dui)无(wu)核(he)武(wu)器(qi)国(guo)家(jia)和(he)无(wu)核(he)武(wu)器(qi)区(qu)使(shi)用(yong)核(he)武(wu)器(qi)的(de)核(he)武(wu)器(qi)国(guo)家(jia)，(，)始(shi)终(zhong)将(jiang)核(he)力(li)量(liang)维(wei)持(chi)在(zai)国(guo)家(jia)安(an)全(quan)需(xu)要(yao)的(de)最(zui)低(di)水(shui)平(ping)。(。)