We find that it is traveling in a circle - or very nearly a circle - round the earth, going complete

题目

We find that it is traveling in a circle - or very nearly a circle - round the earth, going completely round once a month,
句子中going 做什么成分,round做什么成分,going completely round once a month是什么意思?全句翻译

答案

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 1/3 days.我们发现月球环绕地球的轨道总是圆周形...