in-fighting

We must unite the workers in fighting against inhuman conditions.

我们必须使工人们团结起来反对那些难忍受的工作条件。

I applaud your help and cooperation in fighting the scourage of terrorism.

我赞赏您为打击恐怖主义这一祸的帮助与合作。

ScienceDaily (Jan. 4, 2009) — Sinalbin, the same compound that gives white mustard its pungent flavor, could also prove useful in fighting weeds.

2009年1月4日)——白芥子硫苷，一种同样使白芥有股辛辣味道的化合物，在杂草的除去中也证明是有用。