名詞 ledge:

1. a projecting ridge on a mountain or submerged under water
   同義詞：shelf

1. The ledge overhangs by several feet.
   壁架凌空伸出幾英尺。
2. He eased himself along the ledge to reach the terrified boy.
   他小心翼翼地沿著突出的檐向那驚惶失措的男孩靠近。
3. He keeps some books on the window ledge.
   他把一些書放在窗臺(tái)上。

ledge

n.（名詞）
A horizontal projection forming a narrow shelf on a wall.
壁架，橫檔：一種水平的凸出物，在墻上形成一個(gè)狹窄的擱板
A cut or projection forming a shelf on a cliff or rock wall.
巖脊：懸崖或巖石墻上組成平臺(tái)的切口或凸出物
An underwater ridge or rock shelf.
暗礁：水下隆起物或巖石架狀物
A level of rock-bearing ore; a vein.
礦脈；含礦巖層

來源：
Middle English [crossbar]
中古英語 [橫木]
probably from leggen [to lay]
可能源自 leggen [放置]
from Old English lecgan * see legh-
源自 古英語 lecgan *參見 legh-

【引伸】
ledg.y
adj.（形容詞）