你了解自己吗？关于身体的12个神奇事实

It’s thought that if you build up carbon dioxide in your body (by not exhaling), it will help stop your diaphragm from spasming, which is what causes the hiccups. When your diaphragm contracts involuntarily, it forces a quick intake of breath that’s suddenly stopped by the epiglottis. That closure is what causes the hiccup sound.
有人认为如果你憋住了二氧化碳（不呼气），就能让你阻止你的隔膜痉挛，这也就造成了打嗝。如果你的隔膜开始不自觉痉挛，会迫使你快速吸一口气，然后受到会厌的阻挡。会厌就是打嗝声音发出的地方。

What makes my stomach growl?
为什么胃会咕噜咕噜叫？

It can be the sound of your digestive juices churning and stomach muscles contracting as they get prepped for food. To avoid those often poorly timed and embarrassing sounds, eat smaller meals more frequently.
这是你胃液翻转的声音，胃部肌肉仍像消化食物一般蠕动时发出声音。要防止这些令人尴尬的提醒饥饿声音，就少吃多餐吧。

Why do I sometimes get side stitches when I run?
为什么跑步时会胸口疼？

Your diaphragm gets stretched, pulled, and pounded during a run, which can cause that sharp, stabbing pain at the lower edge of your rib cage, usually on the right side of your body. To help the pain pass, slow down and take more controlled, easy breaths.
跑步时你的隔膜伸展拉长以及变重，这会导致胸腔有种剧烈的疼痛感，且往往在身体右侧。要减缓疼痛，那就放慢速度，呼吸均匀。

Why does armpit sweat smell worse than sweat from other places?
为什么腋下流汗的气味比其他部位难闻？

Your body has two kinds of sweat glands. Most of those on your arms and legs secrete a mix of water and salt. But the glands in your armpits (as well as your groin) release an oily substance, which bacteria love. It’s actually the bacteria eating the oil that releases the telltale stench.
身体有两种汗腺。大部分是在手臂以及腿部，分泌的是水和盐分。而腋下（以及腹股沟）处的汗腺会分泌出油性物体，也是细菌的最爱。所以实际上是细菌吞噬油脂时发出的信号啦。