“大家一起嗨起来”的英文表达为“Cheer up together！everybody"。
cheer up 英[tʃiə ʌp] 美[tʃɪr ʌp]
[词典] （使） 高兴起来， （使）振作起来; 打起精神;
词组
cheer others up 鼓励别人
cheer somebody up 使振奋起来 ; 使某人高兴
cheer someone up 使振作起来
cheer us up 鼓舞我们
例句
1.You look as though you need cheering up.
看来你需要振作起来。
2.What are you so gloomy about ? cheer up!
你为什么情绪这么低落？振作起来吧！
3.Now , now , cheer up and forget about it.
好啦，好啦，振作起来，别再想它了。
4.Cheer up and face reality.
高兴起来，面对事实。
5.Mrs. gummidge did not appear to be able to cheer up.
格米治太太好象怎么也鼓不起兴致来。
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