They often fold over or bunch up, turning them into booby traps for anyone shuffling down the hall.

它们经常折叠或堆成一堆，成了任何拖着脚走过大厅的人的陷阱。

youdao

Fold over about 1 "of the top of the bag."

把纸袋顶边往外翻折约2.5厘米。

youdao

The initiatives announced today should increase that proportion at least seven-fold over the next four years, to 15% or more.

今天所宣布的这两项倡议在未来四年内应使该比例至少增加7倍，达到15%或更多。

youdao

As China's economy has grown 10-fold over the past 15 years, the country's environment has been degrading.

VOA: standard.2010.04.07

The collateral damage sustained by the population over the last eight years has driven more and more people into the fold of the insurgents.

VOA: standard.2009.03.26

As a result, Apple's shares have risen more than 38-fold over the past 10 years.

FORBES: Chief Executive Steve Jobs

"I couldn't reach up to fold over the turtleneck on my sweater, " she says.

CNN: Woman bulks up uncontrollably

While only a few hundred participants were taking estrogen plus testosterone, that number increased eight-fold over the 10-year study period.

NPR: Small-Dose Bird Flu Vaccine Proves Effective in Trials