up/down your alley idiom US and Australian English (UK up your street)
合口味;为（某人）所喜爱
to be the type of thing that you are interested in or that you enjoy doing
Kate loves dancing, so salsa lessons would be right up her alley. 凯特喜欢跳舞，所以萨尔萨舞蹈课正对她的口味。