信心不是乐观或悲观,也不是性格特征。它是对积极结果的期待。
Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.
生命与死亡之间的界限,充其量不过是模糊的阴影。谁能说清它们的交界在哪里?
In mathematics, the art of proposing a question must be held of higher value than solving it.