It's something we all take for granted: our ability to look at an object, near or far, and bring it instantly into focus.

And for all the attention grabbed by Beijing and Shanghai, they will be popping up most rapidly in China' s second- and third-tier or lower cities.

I could only see the ball passed quickly from one to another.

He has made rapid and brilliant progress in his studies.

A: Our position on the issue is clear-cut---One China, two sides talks and three links as soon as possible.