我们需要现有数量的两倍。

We need double the amount we already have.

《牛津词典》

专家们预计，为了应对增长需求，发达国家的运营商们必需要架设的发射塔数量是现有数量的三倍。

Experts predict that to meet the growing demand, operators in developed countries may have to treble the number of base stations.

youdao

根据民航总局预测，2010年，我国将拥有民航客机1250架，比现有数量增长80%，共需新增飞行员6500名。

According to prediction of civil Aviation Administration in 2010, China will have 1250 civilian airliner, increasing 80% than now, which need total 6500 new pilots.

youdao

The amount of food available is striking, I mean in the period of time I was--since I was a child there are a lot of changes that have occurred, and I mentioned some of this in the last class-- but when I was a child you didn't have rows and rows of food at a drugstore.

现有粮食的数量是惊人的,当我还是小孩的时候,身边就发生了很多变化,我上节课曾提到过一些,在我小的时候,药店里还没有满货架的食品

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选