1、The new airplane flies at twice the speed of sound.
這架新式飛機以兩倍于音速的速度飛行。

2、If a plane is flying at Mach 2, it is flying at twice the speed of sound
假如飛機以二馬赫的速度飛行，那么它的速度就是音速的兩倍。

3、My own heart, which was pounding at twice the rhythm of his, skipped a beat.
我自己的心臟，能有他心跳節(jié)奏的兩倍。

4、Tickets were selling at twice their face value.
這些票以其面值的兩倍價格出售。

5、The aeroplane will travel at twice the speed of sound.
飛機將以兩倍于音速的速度飛行。

6、Otherwise, drain at twice the OEM interval for conventional oil.
否則，排水的兩倍，傳統(tǒng)石油的OEM間隔。

7、The metal had been valued at twice or thrice its current price.
這種金屬以前的估價是目前價格的兩到三倍。

8、Some companies pay at twice the regular salary.
有些公司支付兩倍(雙薪)。

at twice翻譯