cooling-off period
/ˈkuːlɪŋˈɒf/noun
1- an interval during which two people or groups who are in disagreement can try to settle their differences before taking further action（争执双方在采取进一步行动前设法解决分歧的）冷却时间; 冷却期。
1.1
- an interval after a sale contract is agreed during which the purchaser can decide to cancel without loss（买方在与卖方签合同后可取消合同且不承担损失的）冷静期。