The solution of a problem appears suddenly and is not approached by a gradual, step-by-step procedure.
林業(yè)的未來在于技術(shù),但它必須服務(wù)于自然,而不是剝削自然。
In mathematics, the journey is just as important as the destination.
"In mathematics, you don't understand things. You just get used to them."
種樹的最佳時間是25年前,第二好的時間是今天。