"The past is a foreign country; they do things differently there."
过去是一个异国他乡；他们做事的方式不同。
Any change, even a change for the better, is always accompanied by drawbacks and discomforts.
Fiction is like a spider's web, attached ever so lightly perhaps, but still attached to life at all four corners.
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
自由是思想的果实。