But rivers don't have umbilical cords, so why do they have innies and outies?

但是河流又没有脐带，那它们为什么会有凹的区别呢？

That's why you can see all those bumps and cracks.

这也正是你可以看见路面细小凹和裂缝的原因。

Anger grabbed it and stepped on the broccoli's bumpy surface.

怒怒一把将西蓝花抓住，踩在了西蓝花凹的表面上。

The ground at the lunar south pole is uneven making landing there difficult.

月球南极的地面凹，使着陆变得困难。

Yeah, but did you see the dents in his knuckles? That means he's artistic.

但是，你看见他指关节上的凹么？ 那说明他是个艺术家。

They adorned the smallest crevices, some sprawling, others standing or hanging like coral outgrowths.

它们把最轻微的凹都铺了，有的是摆开来）有的是竖起或垂下，像珊瑚形成的瘤一样。

She skillfully travels the uneven surface of the soccer field.?

她熟练地在足球场的凹的表面上穿行。

Can't be greater. If you ride on bumpy, hilly roads, a mountain bike is what you need.

关系很大呢。如果你在凹的山路上骑，就要用山地车。

The hard uneven pavement is under us, the soft deep mud is on either side.

我们脚下是坚硬的凹的路面，边都是柔软的深泥。

We refer to it a lumpy potato.

我们称之为凹的土豆。

This is a depiction of that lumpy potato.

这是对那个凹的土豆的描绘。

We've also got bumpy colons, which sounds very sexy, whereas carnivorous animals typically have a smooth colon.

我们的结肠也是凹的，发音听起来很性感，而肉食动物的结肠通常是光滑的。

This lava is all blocky and bumpy as it flows.

这些熔岩在流动时都是块状且凹的。

I stared at the bumpy green mask and burst out laughing.

我盯着凹的绿色面具，突然笑了起来。

If bumps show up on a sidewalk, it's the city's job to repair it and smooth it out again.

如果人行道上出现凹的情况，城市的工作是修复它并使其恢复整。

A few yards ahead, I saw the bumpy red formations of clamshell reef.

前方几码处，我看到了凹的红色蛤壳礁。

The bright blue uneven walls were lined with rickety shelves filled with secondhand books.

明亮的蓝色凹的墙壁上摆满了摇摇晃晃的书架，书架上摆满了二手书。

Museum visitors can touch the piece and feel the ridges and depressions.

博物馆的参观者可以触摸这件作品，感受它的凹。

But by carefully looking at the moon, Galileo noticed lots of pointy bumps and shadows.

但通过仔细观察月球，伽利略注意到许多尖状的凹和阴影。

So, now we know about both elastic and inelastic collisions.

所以，现在我们有关于者的信息 柔软而有弹性的凹。