The researchers also found that Shuvuuia had a very wide scleral ring -- tiny bones that circle the eyeball.

研究人员还发现鸟面龙有巩——绕眼球微小骨骼。

Most of it is that white stuff called the sclera, while the most anterior part is the transparent cornea.

大部分是被称为巩白色物质，而最前面部分是透明角。

In fact, research has shown that our surprisingly white scleras, the area that borders the iris, isn't just an accident.

事实，研究表明我们那如此洁白巩, 也就是虹边境东西，并是个巧合。

In 2010, a group of researchers looked at a sample of eye bones, called scleral rings.

2010年，一组研究人员研究了一组被称为巩眼骨样本。

One interesting byproduct is that humans have relatively large white sclera and nearly black pupils and a dark iris.

一个有趣副产品是，人类拥有相对较大白色巩、近乎黑色瞳孔以及深色虹。

It's so important that even dogs have evolved to have larger white sclera and more developed eyebrow muscles in order to show more of their sclera.

正因如此重要，狗甚至进化出了更大白色巩和更发达眉肌，以便展示更多巩。

You don't see such prominent white sclera in any other primates, which means that the importance of nonverbal expressiveness and intent is especially important for human survival.

在其他灵长类动物中， 你看不到如此显著白色巩，这意味着语言表达和意图重要性对于人类生存尤为关键。