实地考察时，孩子们无精打采地跟在老师后面。

The children ___trailed ___behind their teacher on the field trip.

他总是跟在他哥哥后面，模仿他做的一切。

He always ___trails ___after his older brother, imitating everything he does.

疲惫不堪，我们沿着小路缓慢走回露营地。

Exhausted, we ___trailed ___along the path back to the campsite.