1.Get cold feet. 退缩
e.g. Her boyfriend got cold feet about being in a commitment relationship.
e.g.He got cold feet about marrying his girlfriend.
2.Be stone cold/ be freezing cold. 非常冷
e.g.Isn't the heating working? it's freezing cold now.
e.g.It was stone cold, so I felt shivery and had a headache.
3.Cold hands, warm heart. 外冷内热的
e.g.I always thought he was heartless before he donated generously to the charity, it seems like he is one of the the cold hands and warm heart people.
e.g. I thought he was coldly indifferent to other people before he gave a hand to me. He is one of those cold hands and warm heart people.
