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。
It is then left completely undisturbed with plenty of food and water so that it can absorb the atmosphere of its new home
然后给它以充足的食物和水,一定不要惊扰它,以便让它能适应新居的气氛,