On returning I took a run around the campus.

回来时，我在校园跑了一圈。

On returning I took a run around the village.

回来时，我绕着村子跑了一圈。

How to get updated on returning of Bid Security?

如何了解投标保证金退还情况？

On returning to his native shores, he fell sick.

当他回本国时，他生病了。

On returning, he noticed that one of the dishes had gone mouldy.

回来后他注意到其中一个已经长了霉。