我不是传教士，也不是老师。我只是一个歌手。

译文：成家立业后才知道柴米的贵重，自己抚养孩子时才知道报答父母的恩情。赏析：世事的艰难，只有当我们亲身经历后才会懂得，生活的不易，只有当我们尝遍酸甜苦辣咸才会明白。

The most advanced agricultural systems still depend on the most fundamental element: healthy soil.

The true power of mathematics is not in its complexity, but in its simplicity and elegance.