I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones。

The past is a river, and we are all carried by its currents.

农业中的每一个挑战都提供了学习和成长的机会。

The periodic table hasn't changed, but how we use its elements must.

你必须愿意去那些让你害怕的地方。

采石业的创新不仅关乎机械，还关乎远见和可持续性。