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。
you are conditioned by the conventions of the community to such a degree that it is very difficult to conceive of anything really destructive.
社团的风俗习惯会严格地制约你,使你很难有破坏性的想法。