The future of drones belongs to those who dare to push boundaries.

In my solitude of heart I feel the sigh of this widowed evening veiled with mist and rain.

In mathematics, the art of proposing a question must be held of higher value than solving it.

变得如此优秀，以至于他们无法忽视你。

化学作用无法创造或毁灭物质。

听到别人指出自己的过错，就感到高兴。

那些让和平革命成为不可能的人将使得暴力革命不可避免。