翻译：尼克到十五岁时已经自学了数学 Nick ()()math all by himslef by the age of

翻译：尼克到十五岁时已经自学了数学 Nick ()()math all by himslef by the age of by the age of 翻译句子：到足球比赛快开始时,暴风雨已经停了.(用by the time) "by the age of","at the age of"的区别? 到上个学期结束时我们已经学了七首英文歌曲了(英语翻译,用by the end of) in the age of by the age of at the age of的区别 by/at the age of分别使用什么时态 英语翻译in two short years by the age of 23 by the age of 和at the age of的区别 一些关于介词的用法at the age of by the age of有什么区别 请问一下at the age of 与 by the age of 的区别. 1.到上学期期末,我们已经学会了三百多个英语单词 By the end of last term,we ( ) ( )