1、The small boat was bobbing on the rough water of the lake.
小船在洶涌的湖面上下擺動。

2、The small boat is bobbing on the rough water of the lake.
小船在洶涌的湖面上上下擺動。

3、Rough water blurs the Sun’s reflection by reflecting and scattering light in many directions.
粗糙的水面通過對光線進行反射和多角度的散射使得太陽的反射光變得模糊（左圖）。