The number of managers must double to 100 within 3 years.

3年之内管理人员的数量要翻倍，达到100名。

《柯林斯英汉双解大词典》

I had to bend double to get under the table.

我必须弓着身子才能钻到桌子底下。

《牛津词典》

It is estimated that to meet the 2050 challenge, investment must double to 83 billion US dollars a year.

据估计，为了应对2050年的挑战，投资必须翻一番，达到每年830亿美元。

youdao

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

It is a double column, You can see, it starts with hydrogen and goes to mercury in ascending order of atomic mass.

双纵栏，你们看到，从氢开始,然后到水银，按原子质量的升序排列。

麻省理工公开课 - 固态化学导论课程节选

Ok, double line. If there are no questions I'm going to make a dramatic change in topic.

好的，这是重点，如果没什么问题,我要讲下面的内容。

麻省理工公开课 - 计算机科学及编程导论课程节选

Coglan followed with a bloop double to score Ozuna for an early 3-0 lead.

WSJ: Ozuna's 4 RBIs propels Miami to sweep of Mets

That means that prices have to more than double to get back to their highs.

CNN: Commentary: Don't let history be your guide to investing

And that number is predicted to more than double to reach 2 billion slum-dwellers by 2020.

CNN: All About: Developing cities and pollution