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鑼
A gong is a large, flat, circular piece of metal that you hit with a hammer to make a sound like a loud bell. Gongs are sometimes used as musical instruments, or to give a signal that it is time to do something.
例句
On the stroke of seven, a gong summons guests into the dining-room.
7點整時一陣鑼聲將客人召集到餐廳。