每一种化合物都必须有确定的组成，这可以用其元素的符号来表示。

Science is not just about finding answers, but also about asking the right questions.

I don't think about failure. I think about the next step.

最伟大的教训来自最艰难的挣扎。

喜剧是对悲剧的终极报复。

切勿对已经敞开心胸的人闭上双唇。