I wanted to, but Jack Davis needed a photographer.
我真的想参加上课, 但Jack Davis要我拍照。
At a special swimming pool in Los Angeles, children become expert at holding their breath under water even before they can walk.
在洛杉矶的一个特设的游泳池里,孩子们甚至在还没有学会走路时就已经能熟练地在水下屏住呼吸了。