The time factor is more important than price.
A well-managed forest is a gift that keeps giving.
一个物品的旅程可以告诉我们比物品本身更多的东西。
提高就是要改变,而要达到完美就要不断改变。
To safeguard national independence, we must strengthen national unity.
长时间与计算机接触会使数学家变成文员,反之亦然。