作业帮"by the age of","at the age of"的区别?
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"by the age of","at the age of"的区别?
"by the age of","at the age of"的区别?
"by the age of","at the age of"的区别?
by the age of...:是到...岁时,表示的是一个时间段; 如,By the age of 20 you will have been exposed to at least 20,000 hours of television.(到20岁时,你可能花了2万个小时在看电视上面了).
at the age of ...:是在...岁时,表示的是一个时间点; 如:He became an actor at the age of 16.(他16岁时成为了一个演员.)
by the age of,at the age of的区别?
in the age of by the age of at the age of的区别in the age ofby the age ofat the age of的区别
at the age of
at the age of
at the age of
一些关于介词的用法at the age of by the age of有什么区别
by the age of 和at the age of的区别
at the age of three 和 by the age of three有什么区别
by/at the age of分别使用什么时态
英语at the age of?at the age of?
翻译 at the age of
at the age of=?
翻译：at the age of
at the age of造句
at the age of=
at the age of five
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.
The book （）（write） by a famous writer at the age of 20. 动词填空