engine

engine ：something powerful that causes great changes in society , game-changer, 表示可以引发巨大改变的、带动发展的事物

engines of economy/growth/efficiency

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.

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。

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。

The past few years has seen that the engine of the economy of China have shifted from investment to consumption.

2.造句

I always firmly believe that being professional is almost the main engine of every career.