as we all know的意思是正如我们所知或者众所周知,这是以句子充当先行词,as作关系代词的定义从句。
它的高级表达是as is known to us all。例如众所周知,中国是一个历史悠久的国家。 As is known to us all , China is a great country with a long history.
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