Some people are sharp thinkers.

"To us foreigners, bel canto opera is pure and beautiful to our ears while Peking Opera sounds shrill and tense," he said.

It does not take a statistical genius to see the sharp reality: China is at best a minor (as opposed to inconsequential) part of the global economy.

This struggle is sharp and complex. We can never let down guard.

The mind, sharp but not broad, sticks at every point but does not move.