run

　　My brother has no idea how to run a business.

　　I’m afraid the color will run if I wash your new skirt.

　　The discussion between the teachers and the students has run for two hours.

　　He has run short of money.

　　run在教材中的意思为“跑;奔跑”,作动词用。

　　上面句子中的四个run都用作动词,但是意思发生了变化,分别为“管理;经营”、“掉色,退色”、“持续”和“变得”。