snorkel

1. N-COUNT A snorkel is a tube through which a person swimming just under the surface of the sea can breathe. (潜水者用的) 呼吸管

2. V-I When someone snorkels, they swim under water using a snorkel. 使用呼吸管潜泳

Swim off the side of the ship and snorkel in some of the clearest waters imaginable. 游离小船边，用呼吸管潜游到可以想像得到的一些最清澈的水域。