底板活门的英文：
floor trap
n. 地板，地面；基底；议员席；楼层
v. 铺地板；打倒；难倒
floor of the House
英国议会中议员的座席|议员席
floor criterion
最低额标准
The meeting room is in the third floor, sorry, the fourth floor.
会议室在三楼，抱歉，是四楼。
Lay the floor with a carpet. [Lay a carpet on the floor.]
把地毯铺在地板上。
Strew papers over the floor/strew the floor with papers
把文件扔得满地都是.
n. 陷阱；圈套；夹子
v. 诱捕；设陷阱；困住；使陷入困境
ball float trap
浮球式阻汽器
The pain was caused by a trapped nerve.
这疼痛是由于神经受抑制引起的。
The rat was caught in a trap.
那只老鼠被捕鼠器捉住了。
Be ware of falling into their trap.
当心中了他们的计。
She was arrayed with splendid trappings.
她穿着华丽的礼服。