I got up. He snapped his knee up, quickly, and I refused to give him the satisfaction of doubling over.

我站起身。他弯曲膝盖，猛地一抬，动作非常快。我拒绝朝前弯下身子，让他看我的笑话。

Following the ravages of the Black Death, that  percentage began to go up, nearly doubling over the next century or two.

在黑死病肆虐之后，这一比例开始上升，在接下来的一两个世纪几乎翻了一番。

China was one of the 22 countries that committed to doubling their investments in clean energy innovation over the next five years.

中国是承诺在未来五年内将清洁能源创新投资增加一倍的 22 个国家之一。

In the just city, there will be no double man, and the doubling over of the self and the city that is definitional of drama can have no place in education.

在公正的城市里， 不会有双重人格，自我和城市的双重身份是戏剧的定义， 在教育中没有立足之地。