belly buttons

A big belly swelled out beneath the buttons of his dinner jacket.

他晚礼服的扣子的下方隆起大大的肚子.

To wear low-cut jeans showing belly buttons and dye your hair brown are not the fashion.

穿低腰牛仔，露肚脐以及把头发染成多种颜色并不是时尚；

The reason why black people make better sprinters and white people dominate swimming races has been explained by scientists-it's down to their belly buttons.

为什么黑人擅长短跑而白人是游泳比赛的常胜将军？科学家给出了新解释，这是由肚脐的位置决定的。

Scientists found 2368 different species of bacteria living in belly buttons after swabbing the navels of just 60 people.

科学家们在60名志愿者的肚脐上提取样品，发现我们的肚脐眼里可以找到2386种不同的细菌。

Research has been done on the diversity of bacteria, fungi and other organisms that live on our skin, in our guts, even in our belly buttons. But there are other entire ecosystems that surround us. And scientists want to understand how they differ based on how and where we live.

对生存在我们皮肤，内脏甚至肚脐李的很多病毒，真菌和其他一些原核微生物已经做过调查研究，但是在我们的周围有其他的生态系统，科学家想根据我们怎样和在何地生活来理解他们的不同。