天（自然规律）不会改变，道（根本法则）也不会改变

Agricultural technology is not lofty theory, but must be truly implemented in the fields.

真正的发现是让我能够在想要的时候停止做哲学。

You are never too old to set another goal or to dream a new dream.

The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.

世界是一本书，不旅行的人只读了一页。