The price of eggs has risen to double its original one.

鸡蛋的价格已上涨到原来的两倍。

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Separate the eggs, beat the yolks and sugar in a mixer until pale to double the size.

把鸡蛋分开，把蛋黄和糖放在搅拌机里打至颜色发白，搅拌至原来两倍体积。

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New irrigation methods are expected to double wheat production while using one-third of the water required for full irrigation.

VOA: special.2010.02.08

How long does it take for the population of cells to double?

一组细胞的倍增时间是多久呢

耶鲁公开课 - 生物医学工程探索课程节选

So, our two glitches we see when we go from the 2 p, or from 2 s to start filling the 2 p, and then we also get another glitch when we've half-filled the 2 p, and now we're adding and having to double up in one of those p orbitals.

因此，我们的看到的两个小偏差，一个是在开始进入，2，p，轨道，或者说在填满，2，s，轨道之后,开始填，2，p，轨道的时候出现的，另一个则是在，2，p，轨道半满之后,开始继续加电子，使得其中一个，p，轨道上的。

麻省理工公开课 - 化学原理课程节选

"The intuitive healer had told me to double my dose of vitamin B6, " Grant said.

CNN: Herbs, vitamins that can hurt you

It was, according to everyone, a fair offer, so my grandmother asked them to double it.

NPR: Excerpt: 'City of Thieves'

Mille has retail boutiques in nine cities, mostly in Asia, and wants to double that count.

FORBES: Magazine Article