问题描述：
known about 、known in 、know about 、know in 各自的中文意思!
如没这个词组说一下
The artist became well known in his thirties （就是这道题、引发出我的问题。
如没这个词组说一下
The artist became well known in his thirties （就是这道题、引发出我的问题。
问题解答：
我来补答展开全文阅读