释义：事物可能发生一次变化，而人则会经历无数次变化。如果想要不再变化，除非已故命终。

民主必须在每一代人中焕发新生，而教育是它的助产士。

Agriculture technology is the key to solving food security issues, we must continuously innovate and promote agricultural modernization.

Lock up your libraries if you like; but there is no gate, no lock, no bolt that you can set upon the freedom of my mind.