世界领先的英文：
world-leading

world是什么意思：
n. 世界；宇宙；领域；世人；人世；天体，星球

This may be normal in the physical world, but there is no reason for it in the world of software.
在物理世界这是正常的，但没有理由在软件世界也这样。

They wanted to revolutionize the whole world.
他们要在全世界发动革命。

That are inexorably shaping the world of tomorrow.
这将无情地影响明日的世界。

The world is like a fleeting show.
人世如白驹过隙。

There is so much infelicity in the world.
人世间有很多不幸的事。

leading是什么意思：
n. 领导，疏导，铅板 adj. 主要的，重要的

Will you take the lead?
你领个头好吗？

Lead poisoning( or plumbism )：Poisoning by accumulation of lead in the body.
铅中毒:铅在体内积累引起的中毒。

The road leads direct there.
这条路直接通那儿。

The dog is straining at its lead.
那条狗正使劲地拖拽皮带。

Put the dog on the lead!
用皮带牵住狗！