windowsill

详细解释:n. 窗台

英语解释：

名词 windowsill:

the sill of a window; the horizontal member at the bottom of the window frame

详细解释：

win.dow.sill

n.（名词）
The horizontal member at the base of a window opening.
窗沿，窗台：窗户开口底部的横的部分