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。
In the first place, any scientific study requires that there be no preferential weighting of one or another of the items in the series it selects for its consideration.
首先,任何科学研究都要求人们对可供考虑的诸多因素不能厚此薄彼,偏向某一方面。