cooling-off period
noun [ C usually singular ] uk/ˌkuː.lɪŋˈɒf ˌpɪə.ri.əd/ us/ˌkuː.lɪŋˈɑːf ˌpɪr.i.əd/
（购买后可改变主意的）犹豫期，冷静期;（争执双方的）冷却期，冷静期
an agreed length of time in which someone can decide not to buy something they have agreed to buy, or a period in which two groups who are arguing can try to improve the situation before taking further action
There is a 20-day cooling-off period in which the investor can choose to back out of the contract. 有20天的犹豫期，这期间投资者可以选择是否退出合同。