Energy security is a crucial part of national strategic security, and we must firmly keep it in our own hands.

The person who tries to live alone will not succeed as a human being. His heart withers if it does not answer another heart. His mind shrinks away if he hears only the echoes of his own thoughts and finds no other inspiration.

An actor I know is a dimwit who can't count higher than the fingers on his hands. But once he gets on stage, the audience goes so wild, you'd think the house would split in two.

优化是在给定约束条件下做出最佳选择的艺术。