Hit the spot: if sth hits the spot it does exactly what it should do 发挥作用,适得其用,切合需要

I decided I wasn't really hungry, but the coffee really hit the spot and I drank a whole pot. 我其实不饿,可是咖啡来的正是时候,我喝了一整壶. 来源:可可英语-口语频道

Hit it off (with sb): (与某人)一见如故,志趣相投 quickly form or have a good relationship with sb

I met a girl at the party, and we hit it off straight away. 我在晚会上遇见了一个女孩,我们一见如故.

Hit the jackpot: 意外赚大钱,突然发达 to suddenly win, earn a lot of money, suddenly to be very successful

She's hit the jackpot with her latest book---it's sold millions. 她的新书让她赚了一大笔钱—销量达几百万册.