been 是错的,应该是:they have made many great inventions
意思是:他们有许多伟大的发明
One of the first greatest inventions is still very important.
这些伟大发明中最早的一项现在仍然非常重要
There have been many great inventions.One of the first greatest inventions is still very important
There have been many great inventions.One of the first greatest inventions is still very important
英语人气：734 ℃时间：2019-08-21 21:42:35
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