在他生命的头几十年里，他遇到了一些重大的社会事件，并且快速增长的人口使食物供应无法一直维持。
The first few decades of his life were met with major social events, and a rapidly growing population that made food supply not last all the time.
为快速增长的人口提供更多的食物是机械工程师的另一个角色。
Providing more food for the rapidly increasing population is yet another role for the mechanical engineer.
但是其快速增长的人口也意味着大自然之美是受人类活动所支配。
But its fast population growth also means nature's delicacy is at the mercy of human activities.
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