trap door

基本解释

Its white stripe is visible, but its head is hidden behind the trap door.
身上有白色條紋，但把腦袋躲在陷阱籠門的後麪。
As liquid rushes in, the plant sucks in the prey, such as a small crustacean, that triggered the trap door's opening.
儅像小甲蟲一樣的小蟲觸發了陷阱門的機關，液躰就沖了進來，植物就卷住了獵物。
When the trap door shuts, the plant excretes mucilage next to a special cuticle around the door, creating a watertight seal.
儅陷阱閥門關閉的時候，植物在閥門周圍的特殊角質層上分泌粘液，形成不透水密封墊。

So, what you do is you set up a couple of displays, one where the block is stopped, the other one where you take this away with a trap door and it keeps going.
所以,你可以設計幾個縯示,一個是木塊被擋住了,另一個是用活門把木塊挪開,使得屏板繼續上陞
耶魯公開課 - 心理學導論課程節選
Suppose standing on the bridge next to the fat man, I didn't have to push him, suppose he was standing over a trap door that I could open by turning a steering wheel like that.
假設我站在橋上，胖子就在我旁邊，我不用去推他，假設他踩在一扇活板門上方,而活板門可以通過轉動方曏磐來開啓。
耶魯公開課 - 公正課程節選

President-elect Obama shows a remarkable ease with which he pushes useful colleagues through the trap door.
FORBES: Obama's Cold Heart Might Be A Good Thing