lag behind =develop more slowly than others 落后，发展滞后

The auto industry in this country is starting to lag behind that in other

countries.这个国家的汽车产业开始落后于其他国家的水平。

make improvements= make sth. better than it was before获得进展

Some improvements were made in radio communication during World War Il在第二次世界大战期间无线电通讯获得了一些进展。

forge ahead=develop with a sudden increase of speed and power高速发展

Information technology has forged ahead in the last two decades.在过去的20年里，信息技术经历了高速发展。

has improved beyond all recognition= has improved greatly已经今非昔比

Working conditions at the company have improved beyond all recognition during the past two decades.在过去的20年间，在公司的工作条件早已今非昔比了。

be made/rendered obsolete by sth. =be no longer used or needed,because sth. better or more fashionable has replaced it 原本存在的某种工具或技术被新生事物取代或者淘汰

Typewriters have been rendered obsolete by computers打字机已经被电脑所取代了。

be displaced by sth. =be forced out of its original position旧事物由于某种新生事物的出现而不再被人们所使用

Coal has already been largely displaced as a fuel for electricity.作为发电用的燃料，煤炭已经不再被人们当做主要燃料而使用。

be a milestone= be a very important event是一个里程碑/转折点

Taking thisjob was a real milestone in his career获得这份工作是他事业上的一大里程碑。

sth. is no longer a necessity=sth.is not necessary any longer(某事物)已经不再是必要的

Screensavers are no longer a necessity for us.屏幕保护程序对我们来说已经不再是必需的了。

如果你想了解更多雅思托福课程，留学规划或者有任何疑问，欢迎联系新航道重庆学校。

新航道重庆学校官网：cq.xhd.cn

新航道重庆学校官方电话：400-185-9090

推荐阅读：

美国疫情风波下，目前留学美国是怎样的情况呢？

一起来唠唠出国留学英国后的那些“坑”，用自己的血泪教训给大家排个雷~

关于QS排名前100的澳洲院校的花费大全来啦，想去这些学校的小伙伴们有没有准备好钱包呀？

中高考后送孩子出国留学，你需要知道这些大问题