The lithium-ion battery is something that has impacted the world in a very big way.
To be is to be perceived.
When you are stuck, sleep on it. Let your subconscious work for you.
记忆是我们以为已经忘记的东西;它是我们已经忘记自己忘记了的东西。
The task of psychology is to discover the laws of mental structure.