债务要么产生于契约，要么产生于侵权行为。
Don't let the noise of others' opinions drown out your own inner voice.
By recording your dreams and goals on paper, you set in motion the process of becoming the person you most want to be. Put your future in good hands — your own.
The major credit I think Jim and I deserve... is for selecting the right problem and sticking to it.
我认为我和吉姆值得称赞的主要原因是...选择了正确的问题并坚持研究它。