skin-diving

n [U] sport of swimming under water with goggles, flippers and an aqualung or a snorkel to breathe with 轻装潜水（只使用护目镜、 脚蹼、 水肺或潜水通气管）.

skiffle, skiing, skilful, skilful (US skillful), skilfully, skill, skilled, skillet, skillful, skim, skim over, skimmed milk (also ,skim `milk), skimmer, skimp, skimpily, skimpiness, skimpy, skin, skin-deep, skin-diver, skin-flick, skin-graft, skin-tight, skinflint, skinful, skinhead, skinny, skint, skip, skipper, skipping-rope, skirl, skirmish, skirmisher, skirt, skirting-board (Brit) (US `baseboard), skit, skittish, skittishly, skittishness,