短语词组用作动词 (v.)～+名词shorten sails 收帆减速shorten a skirt 将裙子改短shorten the span 缩短时间～+介词shorten by cold 遇冷会缩短shorten sth by an inch 把某物缩短一英寸shorten into 缩短为shorten to 压缩到短语 返回 shortens