请问一下at the age of 与 by the age of 的区别. 还有最好给一下例句. __the age of twenty,he had written two books.
人气：477 ℃ 时间：2020-03-28 03:41:15
解答
at the age of 在某一岁数；在……岁时 by the age of 在某一岁数之前；到……岁时 Incredibly he shot a film at the age of 17. 不可置信的是他17岁就拍了部电影. He must learn to be independent by the age of 18. 他18岁前必须学会独立. 你补充的问题答案用by
