doorsill

汉语翻译

n. 门槛

英语解释：

名词 doorsill:

1. the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway
   同义词：doorstep, threshold

详细解释：

door.sill

n.（名词）
The threshold of a doorway.
门槛