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。

1.China is one of the most powerful engines of the world economy.

2.The good reason for more powerful firms is the rise of an innovative elite that is an engine of efficiency.

翻译

In the past years, investment was the engine of China’s economic . But now the China’s economic is driven by the consumption .

造句

The reform of the tax could be an engine of economic growth.