But they are hundreds of pounds heavier than the other Aepyornis maximus specimens-and their bones look kinda different, too.

但是它们比其他的马氏象鸟标本重数百磅——而且它们的骨头看起来也有点不同。

For centuries Popes have been given the honorary title “pontifex maximus”, which literally translates as “the greatest bridge builder.”

几个世纪以来，教皇被授予“大祭司长”的荣誉称号，这个词的字面意思可译为“最伟大的桥梁建造者”。

For a long time, the biggest specimens had been classified as jumbo members of a species known as Aepyornis maximus.

在很长段时间里，这个最大的象鸟标本被归为种叫做马氏象鸟的巨型成员。

But they are hundreds of pounds heavier than the other maximus specimens—and their bones look different, too.

但它们比其他巨型标本重数百磅——而且它们的骨骼看起来也不。

So the gluteus maximus plays a very important role when you're— when you're running, and turns out to barely be active when you're walking.

因此，当你跑步时，臀大肌起着非常重要的作用，而当你走路时，臀大肌几乎不活跃。

And so your gluteus maximus fires just before your body's about to—your trunk is about to pitch forward and make you hit your nose on the ground, and it helps pull your trunk backward.

因此，在你的身体即将前倾并让你的鼻子撞到地面之前，你的臀大肌就会启动，这有助于将你的躯干向后拉。

And the other time the gluteus maximus fires is when your leg is swinging forward when you're in the air, and it helps decelerate the leg so that you bring your leg down onto the ground.

另次，当你在空中时，当你的腿向前摆动时，臀大肌就会发火，这有助于使腿减速，以便你将腿落到地面上。

And it turns out that very nicely we can see when the gluteus maximus got big in human evolution because its upper portion, the portion that's really important for this function, leaves a trace on the pelvis, on the bone.

事实证明，我们可以很好地看到臀大肌在人类进化过程中何时变大，因为它的上部，即对该功能非常重要的部分，在骨盆和骨骼上留下了痕迹。