windowsill，sill，ledge。对应例句：Place the plants on a sunny windowsill.把这些植物放在阳光充足的窗台上。A thin, glistening thread of moisture ran along the rough concrete sill.一条细细亮亮的水印爬过粗糙的水泥窗台。She put the vase of flowers on the window ledge.她把那瓶花放在窗台上。