SPF 30 is not going to do anything to you over there, and the water is so transparent in those lakes that the algae has nowhere to hide, really, and so they are developing their own sunscreen, and this is the red color you see.
防晒指数30在那里 起不到任何作用， 并且那些湖泊里的水清澈到 水藻完全没有地方藏身， 所以它们形成了自己的防晒层， 也就是你所看到的这个红色。