waterlines

船漂浮时水面在船体上形成的线；船体上标记的一系列短线,用于显示不同装载量下的吃水线位置。

A line formed by the surface of the water on the hull of a ship when she is afloat; any of a series of short lines marked on the hull to show where the waterline would be under different loadings

表示翼型形状的水平线。

A horizontal line indicating the shape of an airfoil.

显示水位曾到达位置的线。

A line showing where the water has been.

水体当前水位形成的线:水面与河岸相交之处；可能随天气、潮汐或季节而升降。

The line formed by where the water level of a body of water currently is: where the water's surface currently meets the bank; it may move higher or lower depending on the weather, tide, or season.

眼睑内缘,位于睫毛线正后方；主要用于指画眼线时的位置。

The inner rim of the eyelid, just behind the lash line; primarily used in reference to the application of eyeliner.