translation.en: Actually, if you just look at your thumbnail -- about a square centimeter -- there are something like 60 billion neutrinos per second from the sun, passing through every square centimeter of your body.
translation.zh: 事实上，如果你看向你的指甲—— 大概一平方厘米的面积——那儿大概有 每秒大概有600亿个中微子 来自太阳，穿过 你身上的每一个平方厘米