But as well as looking out for enemy activity,他們在探查敵軍的動向的同時

as well as:既 ... 又

He grows flowers as well as vegetables.

他既種菜也種花。

It's so thin that it could melt away almost entirely in the summertime,冰面實在太薄到了盛夏

時節很可能會全部融化

melt away:(使)融化, (使)消散

The crowd melted away when the storm broke.

暴風雨一來，人群就散了。

All his support melt away when he really needed it.

在他真正需要支持時，卻得不到一絲半點。

Whether or not that's a good or bad thing, of course,depends on your point of view.當然這究竟是好是壞每個人的觀點不同

depend on:取決于

It all depend on whether she like the boss or not.

一切都取決于她喜歡還是不喜歡這個老板。

A lot will depend on how she responds to the challenge.

在很大程度上將取決於她對這一難題的反應。