Translation of "Doubled" in Chinese

The number of officials doubled last year.

去年官员的数量成倍增加了。

Tom doubled his investment in a year.

汤姆一年内增加了一倍的投资。

The population has doubled in the last five years.

在過去的五年裏人口增長了一倍。

By the year 2020, the population of our city will have doubled.

在2020年以前，我們的城市的人口將增加一倍。

The population of the world is increasing so rapidly that it will be doubled within forty years.

世界的人口渐渐地增长，也许四十年以内会达到现在的一倍。