hū
rán
1
suddenly
2
all of a sudden
忽然下起了大雨,我们决定回家。
Suddenly, it started to rain heavily, so we decided to go back home.
忽然间停下了说话,好像在思考什么。
He suddenly stopped talking, as if contemplating something.
忽然间,他们听到了一声巨响。
Suddenly, they heard a loud noise.
忽然意识到自己忘记带钥匙了。
She suddenly realized that she had forgotten to bring her keys.
忽然站起来,离开了会议室。
He suddenly stood up and left the meeting room.
忽然,一只小鸟飞过了天空。
Suddenly, a little bird flew across the sky.