The first step is a button trap which prevents small objects such as lint, fasteners, buttons, and coins from entering the solvent pump.

第一步是一个按钮，防止细小的物体，如林特，紧固件，按钮，和硬币进入溶剂泵。

youdao

They basically trap for null or empty values in the event that the user clicks the Search button without selecting valid options for both usage and configuration.

它将在用户没有为配方和用法选择有效的选项就单击Search按钮时跟踪null或空值。

youdao

Footage also showed the "button room", where three prison officers press a button at the same time to open the trap door, so that it is not clear which button opened the door.

电视画面上还有一个“按钮室”。在这个房间，三个处刑官同时按下按钮打开活板门，因此并不清楚是哪个按钮打开这个门的。

youdao