讲解

Today's key word is Engine engine[英][‘endʒɪn][美][‘ɛndʒɪn] n.发动机，引擎; 工具; 火车头; 机车; vt.给…安装发动机; Eg. is a search engine.）

It means: A machine designed to convert one form of energy into mechanical energy.

例句

This car has a new engine.

这辆汽车的发动机是新的。

延伸

A web search engine is a software system that is designed to search for information on the internet.

网络搜索引擎是专为搜索互联网上的信息的软件系统。

Today, let's go to the UK and see there is a suggestion saying whether it is a good idea to allow student use search engines like or in the examinations.
Mark Dawe is the head of the Oxford, Cambridge and RSA Examinations board.
Dawe claims that schoolchildren only have limited time to use the search engine during tests and that it's like using a calculator in Mathematics examination.
Very interesting topic and certainly generated a lot of discussion especially in the UK where this is being proposed.
You are gonna hear some students kinda of saying this is a cool idea. Some educators are protesting it.
Online comments:
@Tama Kino from venturebeat.com comments (against)
No point in having exams if they can just the answers. The whole point of exams is to test retained knowledge but if they can use there's no reason to study. will just help schools produce morons instead of academics.
Notes:
--英国官员提议考试中可以使用谷歌，百度等搜索引擎。他表示在有限的时间内，让考生通过网上搜索寻找答案，可以帮助考生提高搜索能力。