世界上充满了显而易见的事情，却没人注意到。
The world is full of obvious things which nobody by any chance ever observes.
Don't watch the clock; do what it does. Keep going.
The future of drones lies in deep cultivation in vertical fields.
Sometimes we get sad about things and we don’t like to tell other people that we are sad about them.
有时我们会为某些事情感到悲伤，而我们不愿意告诉别人我们为此感到悲伤。