water line
柯林斯词典
1. N-COUNT The waterline is a line, either real or imaginary, on the side of a ship representing the level the water reaches when the ship is at sea. 吃水线[usu sing]
Ray painted below the waterline with a special anti-rust paint. 雷用专门的防锈涂料涂船的吃水线以下的部位。
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