On two occasions I've seen people piling up at the bottom of an escalator and had to press the emergency stop button.

我就曾两次见过有人卡在电梯底，而不得不按紧急停止的按钮。

youdao

On two occasions I've seen people piling up at the bottom of an escalator and had to press the emergency stop button.

我就曾两次见过有人卡在电梯底，而不得不按紧急停止的按钮。

youdao