1.Another expression is "hold your tongue." It means to be still and not talk.
hold your tongue 保持緘默
Hold your tongue, you disrespectful old bird!
住嘴!你這沒規矩的老鳥!
Why do you keep chiming in? Hold your tongue!
你為什么老是插嘴?給我住嘴!
2.The expression "hold up" has several different meanings.
hold up 舉起;阻擋;攔截
Mills have iron pillars all over the place holding up the roof.
工廠里到處都有鐵柱子支撐著屋頂 。
Why were you holding everyone up?
你為什么要耽擱大家?