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                sill的复数形式为:sills... 
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                A thin, glistening thread of moisture ran along the rough concrete sill.在粗糙不平的水泥窗台上有一条细细的发光水印。The Royal Airforce sill remained dangerously short of bombers.英国皇家空军仍未脱离极为缺乏轰炸机的危境.Whitlock was perched on the sill of the roo... 
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                n.窗台(板),门槛,[地]岩床,海底山脊,平巷底... 
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                Whitlock was perched on the sill of the room's only window.惠特洛克坐在房间里仅有的那扇窗户的边沿上。A thin, glistening thread of moisture ran along the rough concrete sill.在粗糙不平的水泥窗台上有一条细细的发光水印。Better fastening between sill and wall fo...