The total output is double that of last year.

总产量是去年的倍。

This box is twice as large as that one.

这个盒子是那个盒子的倍。

M is twice as large as N.

M 等于N的倍。

They had to fight with a force twice their number.

他们得倍于他们的敌人作战。

Eight is the double of four. 8

是4的倍。

Ten is the double of five.

十是的倍。

I'm twice your age.

我年龄是你的倍。

The IEA estimates that the yearly energy consumed from IT and consumer electronics is on pace to double by 2020 and triple by 2030 to 1,700 terawatt-hours.

国际能源计，每年 IT 和消费类电子产品的能源消耗，正在按到 2020 年增加一倍和到 2030 年增加倍的速度增长，将达到 1,700 兆兆瓦小时。