we find that it is traveling in a circle--or very nearly a circle -round the earth,going completely
问题描述：
we find that it is traveling in a circle--or very nearly a circle -round the earth,going completely
round once a month,or,more exactly,once every 27三分之一days.第一句里traveling作什么解释 in a circle又怎么解释?为什么要用very nearly a circle? 后面一句completely可以放going前面吗?round once a month（绕一圈一个月）这个once后面不用加什么吗?这是个什么句?这句话真难倒我了啊~请帮我逐句解释.
答
traveling是【移动,经过】的意思in a circle【在一个圆中】very nearly a circle【非常近似一个圆】这句话应该是描述行星轨道的,轨道是椭圆,近似是一个圆completely【一般不】放在going前面,这样读起来更流畅,但是放...