每日一词 engine

1.释义：something powerful that causes great changes in society 

          可以引发巨大改变的事物，带动发展的事物

2. 例句：

中国是带动全球经济增长最强劲的引擎之一。

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

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。

3.造句：

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。

In the past years, investment is the engine of China's economy, while now it is driven by consumption.

参考：In the past few years, China's economy was driven mainly by investment, whereas today its engine is consumption.

过去几年，我学习的动力是为了不错的成绩，现在主要是想自我提升。

In the past few years, my study was driven mainly by high score, whereas today its engine is self-promotion.