When you arrive at your room in a hotel， locate the emergency exits. It only takes a minute.

Identity is a fragile thing, easily lost and hard to regain.

The future of drones is intelligent, collaborative, and autonomous.

今天很残酷，明天更残酷，后天很美好，但绝对大部分是死在明天晚上，所以每个人不要放弃今天。

老鼠和人之间的唯一区别是老鼠会从经验中学习。