The thing about happiness is that you only know you had it when it's gone.
关于幸福，你只有在失去它的时候才知道你曾经拥有过。
Literature is the memory of humanity, and without memory, humanity would be lost.
A forest without wildlife is like a symphony without music.
要理解一个句子的意义，我们必须考虑说话者的意图和话语的背景。
Keep your head up, God gives his hardest battles to his strongest soldiers.
Sustainability is not an option anymore; it's a necessity for the future of agriculture.