Desert sand shaped by wind is more rounded than sand shaped by water.

风成的水成的更圆。

How do these differences come about?

这些不用是如何成的？

They hold a shape in the mouth.

嘴巴成个状。

These disks are the remnants of planetary formation.

这些圆盘是行星成的剩余物质.

There is an unlikely alliance forming between Brazil's leftwing and rightwing parties.

巴西左翼和右翼政党之间成了似乎不太可能成的联盟。

Some valleys are formed by flowing water, and others are formed by glaciers.

些山谷是由流水成的，另些是由冰川成的。

They can make two dimensional forms as sheets, or three dimensional crystals.

能成片状的二维结构，或三维晶体。

Stalagmites grow up where lime laid and drips hit the cave floor.

含有石灰质的水滴落石床成石笋。

Entirely new business models are emerging; three main ones were identified by the report's authors.

全新的商务模式正在成，报告作者总结出其中三种。

So you have an oxygen with 2 hydrogens and it forms this big lattice structure.

成了这个大的晶体结构成了这个大的晶体结构。

Perfectionism develops in our formative years, and so young people are more vulnerable.

完美主义是在我性格成阶段成的，所以年轻人更容易受到伤害。

That material rapidly coalesces, and bingo, you've got a moon.

这些物质迅速结合，没错，之后就成了月球。

So a lot of it just comes down to grunt work.

所以量变成质变。

6 billion years ago the earth forms.

46亿年前地球成。

And this is contrasted by the lady's social skills and common sense.

这与剧中女性成鲜明对。

New shores were formed and totally different creatures would have washed up onto the shores.

新的海岸成了，完全不同的生物被冲向了海岸。

And those massive amounts of particles can cause clouds to form.

排出的巨量微粒便会成云朵。

Today's rain is a sharp contrast to yesterday's sunshine.

今天的雨与昨天的阳光成鲜明对。

And they can see flash flooding very quickly.

并且洪水成的速度很快。

Which is the start of cancer formation.

这正是癌症成的起点。