extend和expand有什么区别

extend指在一个方向上的延伸、加长，例如：Theoretically,a line can extend into infinity.从理论上来说直线可以无限地延伸。expand指范围、体积的扩大、膨胀，例如：metals expand when they are heated.金属受了热就会膨胀。extend：extend侧重于一个方向上的延伸。expand：expand侧重于一个范围、体积的的延伸。

1、过去分词：extended.

2、过去式：extended.

3、现在分词：extending.

4、第三人称单数：extends.

第三人称单数：expands.

现在分词：expanding.

过去式：expanded.

过去分词：expanded.

1、The high-speed train service is planned to extend from Paris to Bordeaux

高铁拟从巴黎延伸至波尔多。

2、The vineyards of Anjou extend from west of Angers to up-river of Saumur.

安茹葡萄园从昂热西部一直延伸到索米尔的上游。

3、The oil well extended several hundreds of feet in depth.

油井向下延伸了数百英尺。

4、The show has been extended for another six weeks.

展览会又延长了六周。

5、Careful maintenance can extend the life of your car.

精心保养可延长汽车寿命。

6、By popular demand,the tour has been extended by two weeks.

应大家要求，这次旅游延长了两周。

7、This government is committed to extending parental choice in education.

本届政府承诺扩大父母在教育方面的选择权。

8、The company plans to extend its operations into Europe.

公司打算将业务扩展到欧洲。

9、Our land extends as far as the river.

我们的土地一直延伸到河边。

10、Hospitals were already fully extended because of the epidemic.

这场流行病已使各医院以最大负荷运转。

11、The offer does not extend to employees'partners.

这项优惠不包括雇员的伴侣。

12、Ribbon developments extended along the main road.

一排排建筑沿着大路伸展。

13、His willingness to help did not extend beyond making a few phone calls.

他的乐意帮助只不过限于打几个电话罢了。

14、Jim didn't really have to extend himself in the exam.

吉姆大可不必为这次考试那么拼命。

15、This deadline will be extended only in exceptional circumstances.

只有在特殊情况下才会延长最后期限。

16、I'm sure you will join me in extending a very warm welcome to our visitors.

我肯定你们会同我一起向我们的客人表示热烈的欢迎。

17、This year they have introduced three new products to extend their range

今年他们发布了3种新产品，以扩大产品范围。

18、Parallel lines will never meet no matter how far extended

无论延伸多长，平行线永不相交。

19、The range could do with being extended.

范围需要扩展。

20、Our personal space extends about 12 to 18 inches around us

我们的个人空间是周围12到18英寸的范围。

1、In breathing the chest muscles expand the rib cage and allow air to be sucked into the lungs.

呼吸时胸部肌肉使胸廓扩大让空气吸入肺部。

2、The interest rate's coming down.I'll be able to expand or stay in business

利率正在降低，我可以扩大公司或者维持经营。

3、The new system expanded the role of family doctors.

新体制扩大了家庭医生的作用。

4、We've expanded the business by opening two more stores.

我们增开了两个商店以扩展业务。

5、Could you expand on that point,please?

请你把这一点详细说明一下好吗？

6、We are currently seeking new ways of expanding our membership.

目前，我们正探索发展会员的新途径。

7、The government provided an additional£25 million to expand the service.

政府另拨2500万英镑用于扩展该服务项目。

8、The villages expanded and merged into one large town.

这些村庄扩大了并且结合成了一个大集镇。

9、There are no plans to expand the local airport.

目前尚无扩建地方机场的方案。

10、The universities have expanded,thus allowing many more people the chance of higher education.

大学扩招了，这样就使更多人能有机会接受高等教育。

11、The recession knocked on the head any idea of expanding the company.

经济衰退使扩展公司的任何想法都化为泡影。

12、I repeated the question and waited for her to expand.

我把问题重复了一遍，等着她详细回答。

13、The attempt to expand the business was a catastrophe for the firm.

扩展业务的尝试使这家公司陷入困境。

14、Looking forward,we hope to expand our operations in several of our overseas branches.

展望未来，我们希望拓展其中几家海外分公司的业务。

15、The school has been refused permission to expand.

学校扩充未得到许可。

16、They expanded the shipyards and started engineering works.

他们扩建造船厂，开始了工程施工。

17、If metal gets hot it expands.

金属受热就膨胀。

18、A child's vocabulary expands through reading.

孩子的词汇量通过阅读得到扩大。

19、The waist expands to fit all sizes.

腰围可松可紧适合任何尺码。

20、The country was trying to expand territorially.

这个国家在设法扩张领土。