The scientist is not responsible for the laws of nature, but it is his job to find out how they operate.
科学家不对自然法则负责,但他的工作是找出它们如何运作。
失去一个父母可能被视为不幸;失去两个则看起来像是粗心大意。
When I look at the world I'm pessimistic, but when I look at people I am optimistic.