It's not a chocolate coin wrapped in gold foil, people. That's actual metal that composes that Olympic medal, so why do athletes bite them?

同志們，金牌又不是包裹著金箔紙的巧克力，而是貨真價實的金屬制品，運動員們為什么如此熱衷于咬獎牌？

There's actually a few reasons, but the most obvious is that it's a pose photographers really, really like to capture.

事實上有不少原因，而最明顯的原因是，這是攝影師超級超級喜歡拍的一個動作。

"It's become an obsession with the photographers," David Wallechinsky, the president of the International Society of Olympic Historians and co-author of "The Complete Book of the Olympics" told CNN in 2012. "I think they look at it as an iconic shot, as something that you can probably sell. I don't think it's something the athletes would probably do on their own."

Biting down on a hunk of metal is more likely something someone might have done during the Gold Rush to test whether the shiny golden rock they just panned for was actually pyrite or fool's gold. Human teeth are harder than gold but softer than pyrite, according to the Mohs Hardness Scale, which categorizes how easily minerals scratch. This means a quick gnaw to real gold would actually leave an indentation. A hard chew of pyrite, meanwhile, might damage your teeth.

對著金屬大力的咬下去，這更像是淘金熱時期的人做的事情，目的是測試剛淘出來的金光閃閃的石塊是否只是黃鐵礦或（或者叫愚人金）。根據莫氏硬度表，人類牙齒的硬度比黃金大但比黃鐵礦

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