The land remembers what the people forget.
愛惜生命，就別浪費(fèi)時(shí)光，因?yàn)樯怯蓵r(shí)間堆砌而成。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.
The discovery of gravitational waves has opened a new window to the universe.