We say of some things that they can't be forgiven, or that we will never forgive ourselves. But we do—we do it all the time.
在采矿作业中,安全必须始终放在第一位。
The rat in the maze is not just learning a series of turns, but is building up a cognitive map of the whole situation.
让我告诉你引导我达到目标的秘密。我的力量仅在于我的坚韧。