extend和expand区别.pptVIP

extend和expand区别 extend:直线状“伸展”，引申“扩展范围、领域 等；用于比喻意义时，表影响、势力和范围都 超过目前； expand:为最普通用语，主要指物体由于外力或 内力的作用而使面积、体积、数量等变 大；也可以用于抽象事物。 extend用于具体事物，expand多是抽象事物。管道设施的架设延伸，就用extend;市场的扩大延伸，就是expand。 extend vi/vt. 1. 延续，持续（to continue to happen or exist for a certain period of time); The tourist season extends from May till October. 旅游季节从五月延续到十月 2. 延长，推延（to increase a period of time that has been agreed ,especially in order to finish a job or pay money that you owe) Cant you extend your visit for a few days? 你们访问的时间不能延长几天吗? 3.扩大；延长[建筑或道路等]（to continue for a particular distance or over a particular area)； 。 4. 伸开，舒展（to stretch out a part of your body) He extended his hand in greeting.他伸出手来表示欢迎。 5. 提供，给予，表示（help,sympathy,thanks etc)[(+to)] I would like to extend a warm welcome to our visitors. 我想对我们的来访者表示热烈的欢迎 6.使竭尽全力（to make someone use all their strength , intelligence etc,in order to archieve good results) 7.延伸，扩大（if you extend your control,influence etc or if it extends over sth. ,it becomes more powerful) expand vt./vi 1. 展开,张开(帆,翅等) The eagle expanded its wings. 老鹰展开翅膀。 2. (使)膨胀/扩张 Water expands when it freezes. 水结冰时体积膨胀。 A tire expands when you pump air into it. 轮胎打了气就会胀大。 3. 扩大,增强(to become greater in size,number,or amount,or importance) In ten years the citys population expanded by 12%. 十年之中,该城人口增加了百分之十二。 Student numbers are expanding rapidly. expand one`s words/expand the local airport 扩建机场 4.(使）[业务]扩展（if a company ,business etc expands or if someone expands it,they open new shops,factories etc) He is thinking of expanding his business. 他正考虑扩展他的生意。 expanding economy不断发展的经济 The coffee shop may expand into a full restaurant. 那家咖啡店将可能扩展成为一家完善的餐馆 We have plans to expand into the US market. 我们打算扩展业务进入美国市场。 5. 增加[活动量]；扩展[活动范围]（to increase the amount or range of an activity) 6. 详细说明[(+on/upon)] They have expanded my view on the question. 他们已更充分地阐明了我对这个问题的观点。 expand/enlarge