contraction
美[kənˈtrækʃən] 网络收缩；战略性撤退战略；子宫收缩；订约
1 . The contraction of muscles uses energy and releases heat.
肌肉的收缩消耗能量并且释放热量。
来自柯林斯例句
2 . the expansion and contraction of the metal
金属的膨胀与收缩
来自《权威词典》
3 . Contraction of the timbers left gaps in the fence.
木料收缩,结果围墙露出缝来.
来自《简明英汉词典》
4 . The forces of expansion are balanced by forces of contraction .
扩张力和收缩力相互平衡.
来自《简明英汉词典》
5 . "It's" (with an apostrophe) should be used only as a contraction for "it is".
it's（带撇号）只能用作itis的缩约形式。
来自柯林斯例句
1.(physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
2.the process or result of becoming smaller or pressed together;
the contraction of a gas on cooling
3.a word formed from two or more words by omitting or combining some sounds;
`won't' is a contraction of `will not'
4.the act of decreasing (something) in size or volume or quantity or scope