农业科技是解决粮食安全问题的关键，我们必须不断创新，推动农业现代化。

目的赋予心理活动意义。

唱歌不仅仅是技巧，更是情感的传递。

The only real voyage of discovery consists not in seeking new landscapes, but in having new eyes.

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

真実は、常に残酷である。