The mining industry has a responsibility to leave communities better than we found them.
The worst of having a romance of any kind is that it leaves one so unromantic.
合作和知识共享对于科学的进步至关重要。
数学中的合作是必不可少的；没有人能独自解决所有问题。
推理小说的魅力不仅在于解谜，还在于对人性的深刻剖析。
I know that the appearance of Los Angeles at four o 'clock in the morning every day.
The way we see things is affected by what we know or what we believe.