--------------(众所周知）the moon travels round the earth once ev

As we all know
如还有不懂的,还可以继续追问哦\(^o^)/~
再问： 可以分析下么？ 这题考的是非限制性定语从句
再答： 你只要记住三个矩形就行啦 it is known to us all that ..... as is known to us all,..... what is known to us all is that... O(∩_∩)O~
再问： ....老师让我们讲解 那该怎么样讲呢、、、 帮忙分析下。。