You operate the trapdoor by winding this handle.

你要转动这个手柄来操纵活动天窗。

《牛津词典》

Lisa said, after crawling through the trapdoor.

莉莎爬过暗门的时候说。

youdao

NovaboneTM could be used as a substitute of autogenous bone partially in the trapdoor procedure for avascular necrosis of the femoral head.

采用“活门板”式手术充填股骨头骨缺损灶时骨玻璃可部分替代自体骨。

youdao

These cracks had nothing to do with where she stood, but were instead the result of upward pressure from beneath the trapdoor.

NPR: Excerpt: 'Killer Weekend'

About the size of a dollar bill, the mud covered the carpet and spanned the crack of the trapdoor that led down into the three-foot-high crawl space beneath the house.

NPR: Excerpt: 'Killer Weekend'

He ascended the stairs at the end of the passageway, nudged open the trapdoor, and entered the passageway that ran lengthwise between Ford's and the Star Saloon next door.

NPR: Excerpt: 'Manhunt'