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。
The only regular visitors to the monastery in winter are parties of skiers who go there at Christmas and Easter.
冬天常来修道院参观的只有一批批滑雪者。他们在圣诞节或复活节到那儿去。