If you say that, you mean that it’s obvious.
Do something again, from the beginning, especially in a needless or inefficient effort.
To do something differently, after it has been done in the same way for a long time.
To change your ideas or behaviour as the world or the situation changes.
To try to return to the past
To continue to work well over a long period of time or to remain popular or respected for a long time.
To explain something to someone in a very complicated way, in order to impress them rather than help them understand.
To become realistic; to become alert of what is going on around one.
Rarely, once in a very long time.
When new ideas or products are tested on someone.
Once in a blue moon
It doesn't take a rocket scientist
Come down to earth
To turn back the clock
Be somebody's guinea pig
Move with the times
Break the mould
Stand the test of time
Reinvent the wheel
Blind someone with science
