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》

South Korean pilots, averaging six or seven hours a week in the air, say their North Korean counterparts, flying older model MiGs, are lucky to fly once or twice a month.

南韩飞行员每周平均有六到七小时上天的机会，但他们的北方同行只能驾驶古老的米格战机，一个月或许才能有幸飞上一两次。

youdao

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

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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