used in writing to represent the sound that people sometimes make in order to agree with or show understanding of something that has just been said

"Did you hear what I just said?" "Uh-huh." “你听见我刚说的话了吗?”“嗯。”

"You know that strange guy we saw yesterday?" "Uh-huh." “你认识我们昨天见到的那个奇怪的家伙?”“嗯。”

"I'll be back a little late because I have to stop at the shops." "Uh-huh." “我回来会稍晚些，因为我要顺便去商店。”“嗯。”