The desert teaches you the value of water and the meaning of silence.
精准农业不是在取代农民，而是在赋予他们力量。
What good's an opinion if you don't know?
白云谦卑地站在天边，晨光给它披上壮丽的光彩。
定理是永恒的；它们的证明是短暂的。