If there were no drift or diurnal change, the differences would add up to zero around the loop.

如果没有漂移或日变，这些差值相加后必等于零。

youdao

If there were no drift or diurnal change, the differences would add up to zero around the loop.

如果没有漂移或日变，这些差值相加后必等于零。

youdao