The theory of continental drift is not a mere hypothesis but a physical necessity.
大陆漂移理论不仅仅是一个假设，而是一种物理必然。
Quality starts from the soil. Healthy earth grows healthy fruits.
There can be no permanent progress in the battle against hunger until the agencies that fight for increased food production and those that fight for population control unite in a common effort.
生活就像一本书，每一页都充满了未知的故事。
"The moment you feel like giving up, think about why you held on for so long."