And in a further gesture of goodwill, the Chinese leader promised help in building 100 clean energy projects, part of what China says is its commitment to fight global warming.

VOA: standard.2009.11.08

It's very important because it provides-- does provide energy but it helps with muscle building and with the manufacturing the body does of its own proteins, and therefore, is a vital part of the diet.

蛋白质非常重要,因为它能提供,的确能提供能量,但它也能帮助肌肉塑形,参与身体内自身蛋白的合成,因此是饮食中不可或缺的组成部分

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

China is building hundreds of coal-powered energy plants each year.

VOA: standard.2010.08.03