Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.

释义：如果人与人之间的关系是建立在利益之上的，那么一旦利益消失，两人的关系也会变得疏远。

PID控制器的本质在于它能够根据系统的过去和现在状态预测其未来行为。

Climate science is not about belief - it's about evidence and rigorous testing.

I'm just trying to change the world, one sequin at a time.