问题描述: it is known to us all that light.=lt is___ ____that light... 1个回答 分类:英语 2014-11-02 问题解答: 我来补答 well knownbe known to us表示众所周知.希望我能帮助你解疑释惑. 再问: 其实答案是 common knowledge,我们老师讲的 再答: common knowledge就是well known的意思,希望我能帮助你解疑释惑。 展开全文阅读