1）翻译下面的句子：
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.
2）场景：
马歇尔计划是战后经济发展的原动力。
The Marshall Plan was the engine of post-war economic growth.
