Postnova
[天]爆后新星
🗣️ 情景例句
Sorry, but he is out at the moment.
抱歉，他现在出去了？
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 key to a solution of that problem lay in an everyday observation.
可以从我们的日常生活观察中找到这个问题的答案。