Doublethink means the power of holding two contradictory beliefs in one's mind simultaneously, and accepting both of them.

I think the best thing you can do is to be grateful for what you have.

对抗传染病的斗争是一项超越国界的全球性努力。

The truth is often found in the margins.

In the world of computation, complexity is not an enemy, but a challenge to be understood and mastered.