地球绕太阳一周要一年的时间。

The earth takes a year to orbit the sun.

《牛津词典》

我们的地球相对来说比较小，绕赤道一周只有24902英里。

Our planet Earth is comparatively small, with only about 24,902miles around the equator.

youdao

我们的地理老师告诉我们月亮每28天绕地球一周。

Our geography teacher told us the moon circles the earth every 28 days.

youdao

How long does it take to go one round in this fashion?

质点绕圆一周需要多久

耶鲁公开课 - 基础物理课程节选