You may start to notice an underwater wave that brushes your knees while doing the dolphin kick.

你会注意到一个水下波刷你的膝盖，当我在海豚式打腿。

youdao

An air bubble ascending from the ocean floor contorts and twists into a semicircle as a wave breaks in the background. Captured as part of the Underwater Project.

一个气泡从大洋下曲折上升，在背景中形成一个半圆。该图作为水下项目的一部分而拍摄。

youdao

With underwater kick, your movement should be similar to a wave.

在水下踢腿时，你的身体动态应该如波浪一样。

youdao

Dounreay Site Restoration Limited's (DSRL) report draws on work commissioned in 1996 and 2003 that considered the threats posed by a tidal wave, either caused by an earthquake or an underwater rock slide.

BBC: Dounreay reports on tsunami and earthquake resilience