现在数学家面临的最大问题可能是黎曼假设。
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
Every ton of coal we extract carries equal weight in responsibility.
"Writing is a way to give voice to our hopes."
快乐在于旅程之中。
The past is always tense, the future perfect.
The success of any political system depends on its ability to deliver both prosperity and justice.