地球形状的问题本质上是势理论中的一个问题。
Precision agriculture isn't replacing farmers - it's empowering them.
Fear is such a powerful emotion for humans that when we allow it to take us over， it drives compassion right out of our hearts.
A man should always consider how much he has more than he wants.
宇宙充满了神奇的事物，它们耐心地等待着我们的智慧变得更加敏锐。