So if I put this inside this water here, you can see a silver reflective coating around it, and that silver reflective coating is the layer of air that's protecting the water from touching the paddle, and it's dry.
如果我把这个桨放在水里， 大家会看到它上面的银色反光涂层 这层银色的反光涂层 就是防止水 弄湿桨的空气层。看，还是干的！