Everything must be carefully examined before we act, then twice as much can be accomplished with half the effort.

事情要考虑周详以后再动手，才能够事半功倍。

《新英汉大辞典》

The run starts at the café, goes past the tennis courts then twice around the lake and finishes back where it started.

从咖啡馆开始跑步，经过网球场，然后绕着湖跑两圈，最后回到起点。

youdao

On the sixth length, breathe twice to the right then twice to the left.

在第六个长度中，进行先右侧呼吸两次，然后再左侧呼吸两次。

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

Fat has more then twice that.

脂肪是它们的两倍

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If one chord holds twice as long or only half as long, then we have an irregular harmonic change--irregular rate of harmonic change.

如果某一个和弦持续的时间是其他和弦的两倍或者只有一半，这就是不规则的和声改变。

耶鲁公开课 - 聆听音乐课程节选

Ronaldo was then twice narrowly off target before Barcelona made their first serious incursion into United territory.

BBC: Barcelona 2-0 Man Utd

The world number three then twice broke his opponent's serve in the second set for an ultimately comfortable victory.

BBC: Nadal crashes to defeat in Madrid

Then twice within as many minutes Taylor came close to opening the scoring.

BBC: Bolton 0-0 Blackburn