又不是巧克力，奥运冠军为啥都爱咬金牌？
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?
同志们，金牌又不是包裹着金箔纸的巧克力，而是货真价实的金属制品，运动员们为什么如此热衷于咬奖牌？
There's actually a few reasons, but the most obvious is that it's a pose photographers really, really like to capture.
事实上有不少原因，而最明显的原因是，这是摄影师超级超级喜欢拍的一个动作。
"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."
“摄影师们非常痴迷于这个动作” 国际奥林匹克历史学家协会主席，《奥林匹克运动会全书》的作者戴维•沃利金斯基2012年在接受CNN采访时说，“我觉得他们把这看作是一种标志性的时刻，可能认为这样的照片会比较容易卖。我觉得，如果让运动员自己选的话，他们还真不一定会这么做。"
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.