contraction n.收縮；縮寫；緊縮
【類】convulsion:contraction＝frenzy:emotion
痙攣是強烈的收縮＝瘋狂是強烈的感情
astringent:contraction＝anesthetic:insensibility
收縮劑用來收縮＝麻醉劑用來麻醉