付出很大代价
to suffer a lot as a result of a particular action or event
If you refuse to cooperate with us, you will pay dearly for it. 如果拒绝与我们合作，那么你将为此付出沉重代价。
She paid dearly for her mistake, losing both her job and her livelihood.
Your behaviourbehavior is unforgivable, and you will pay dearly.
They voted in a corrupt government and they've paid dearly for it.
We continue to ignore abundant signs that the planet is in grave trouble and I'm afraid we will pay dearly.
See also: dearly (COSTING A LOT)