We fly between Rome and Paris twice daily.

我们每天有两次航班穿梭于罗马和巴黎之间。

《牛津词典》

The jet can fly at twice the speed of sound.

这喷气式飞机能以两倍于音速的速度飞行。

youdao

The aim is to fly at about Mach 2, twice the speed of sound.

目标是以大约2马赫的速度飞行，也就是音速的两倍。

youdao

And the other part about it is if feathers were twice as heavy, or half as strong, then birds couldn't fly."

VOA: special.2010.06.01

It said it will fly twice daily between Aberdeen and Bristol, and also between Manchester and Antwerp in Belgium.

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Business travellers pay nearly twice as much to fly to San Francisco from London as from Milan.

ECONOMIST: Open the skies

It would be almost twice that of Boeing, whose products you can fly.

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