Hmf
abbr. hollow metal frame 空心金属架
🗣️ 情景例句
It will take less than 5 minutes to check out.
退房最多只需5分钟。
What day is today?
今天是星期几？
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。