He has come to be recognized as an expert in the problem of overpopulation and food supply.
由于他的经验促使他终于成为了公认的人口过剩和食物供应问题的专家。
Mathilde! Oh yes. Sorry, I didn't recognize you. Where have you been all these years, Mathilde? I hope you weren't ill. You don't look very well.
玛蒂尔德!真的是你呀!对不起,我没有认出你来。这些年你上哪儿去了,玛蒂尔德?我想你没有病吧,你的脸色看来不太好。