各位英语高手指教一下：把“俗话说”翻译成英文

As the (old) saying goes
例句：
As the saying goes, "Those that ignore history are doomed to repeat it."
Just like that old saying goes, "You have to be in the right place at the right time."

it is known to all that等于”众所周知“
As the old saying goes that等于”俗话说“

Per saying...