window-sill

基本解釋

He neatly aligned the flower-pots on the window-sill.
他整齊地把花盆一字排在窗臺上。
His hands were black and his long tail hung over the window-sill into the room.
他的雙手是黑色的，他的長尾巴掛在窗臺上方，伸到房間里來。
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Whether you've got a balcony, terrace, window-sill or garden, you need to make sure that the space is suitable for growing plants.
不管你擁有的是陽臺、露臺、窗臺還是花園，你需要確保你的空間適合種植植物。

Both the front and rear set the tone for the vehicle's width, which comes courtesy of the wide, prominent grille and headlamps extending into the vehicle sides, as well as the wide rear window, two-piece rear lamp cluster and the large tailgate with low boot sill.
ENGADGET: Mercedes-Benz introduces B-Class Electric Drive, we go eyes-on
On the only side street, I found a house that might have belonged to him—a stucco-covered house, with a dormer window above the front door, books stacked on the sill of that window.
NEWYORKER: Amundsen

A windowsill is a shelf along the bottom of a window, either inside or outside a building.