世界上充满了看不见的伤口。
The world is full of invisible wounds.
The true challenge in mathematics is not solving problems, but asking the right questions.
要依靠道德治理国家。这样就像北极星一样,虽然固定在一个地方不动,但群星却甘愿环绕在它周围。
The greatest challenge we face is balancing economic growth with environmental responsibility in aquaculture.