our soldiers take great pains in saving the survivors in the quake
问题描述：
our soldiers take great pains in saving the survivors in the quake
为什么填pains
答
习惯用语,take pains：费尽力气,煞费苦心,尽力设法
另,以下含义是用复数：
[pl.]辛苦,劳苦; 努力,费心
[pl.]分娩阵痛