有时候最难的事情和最正确的事情是同一件事。
Sometimes the hardest thing and the right thing are the same.
Chemistry is the science of matter, but I prefer to see it as the science of change.
有时你可能会觉得自己不够好,但你必须记住你是上帝的孩子,你被爱着。
Natural selection is the only known natural process that can build functional complexity.