engine是“引擎”“发动机”的意思，像发动机可以带动机器运行一样，engine 常可以用来表示“可以引发巨大改变的事物”“带动发展的事物”，比如微信就是腾讯的 engine。
英英释义：something powerful that causes great changes in society
例句：
① 比如，有人说中国是带动全球经济增长最强劲的引擎之一，我们就可以说：
China is one of the most powerful engines of the world economy.
②《纽约时报》在一篇名为 China Rules 的文章中回顾了中国的发展，说到中国社会结构转型时，有这样一段话：
Bureaucrats who were once obstacles to growth became engines of growth.曾经阻碍发展的官员们，如今成为了发展的核心力量。
③ 最新的一期《经济学人》中也出现了 engine 的这种用法：
The good reason for more powerful firms is the rise of an innovative elite that is an engine of efficiency.
更多巨头公司的出现得益于一批具有创新精神的精英群体的崛起，后者正是效率的驱动引擎。
（1）翻译：
过去几年投资是中国经济的引擎，现在主要是消费在拉动中国经济。
While investment was the engine of China's economy a few years ago, today it's mainly driven by consumption.
In the past few years, China's economy was driven mainly by investment, whereas today its engine is consumption.
The engine of China's economy was the investment in past few years, but now would be consumption.
（2）场景：在家庭这艘大船上，爸爸一般会成为引擎，促使整个家朝着幸福的港湾航行
造句：Dads should be the powerful engine of the family boat, which bring the group to happiness.
