11.22 engine

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。

In the past few years invenstment was the engine of China's economy. Nowadays the economic growth is instead led by consumer spending.

衔接词可以使用 while， whereas； 拉动经济可以用 drive

2) In the first half of the 19th century, the engine room of Germany was the Ruhr.