But we were left wondering—what cause the population to increase so suddenly?

但我们不禁想问——是什么导致了人口增长这么突然？

youdao

The final potential cause is an increase in snacking and eating out over recent decades both in terms of how often they happen and how much they contribute to our overall energy intake.

最终的潜在原因是近几十年来吃零食和外出就餐的次数增加，这不仅体现在其发生的频率上，还体现在其对我们整体能量摄入的影响。

youdao

If you want to reduce boredom and increase your sense of meaning, seek work where you can make a unique contribution, or find a cause you can support with your time and talent.

如果你想减少无聊感，增加意义感，那就找一份你可以做出独特贡献的工作，或者找一份需要你的时间和才能的事业。

youdao

This leads to an increase in diseases like diarrhea, the second leading cause of death in children under five.

VOA: special.2010.04.05

"It's not clear what's going to cause them to increase their spending in the short term, given the uncertainty in the economy, " said Dell's chief financial officer Brian Gladden.

BBC: Dell's profits slump by 47% on weak sales

"Removing the current restrictions would cause migration to increase and cause those who currently come to the UK for temporary purposes to seek more permanent employment in the UK, " he added.

BBC: Restrictions on Bulgarian and Romanian workers extended

"We don't want to do anything that would cause costs to increase for the majority of responsible borrowers who are paying off their loans, " Mr. Grassley said in a statement.

WSJ: Student Loan Bankruptcy Fears Drive Congress to Rethink Law