contraction常见的搭配
tonic contraction 紧张性收缩
contraction cavity 收缩孔
contraction ratio 收缩比
contraction coefficient 收缩率，收缩系数
volume contraction 体积收缩
uterine contraction 子宫收缩
after contraction 后期收缩
lateral contraction 横缩
thermal contraction 热收缩
