事先做好的某事用英语怎么说?

如题所述

第1个回答  2006-02-27
sth being done in advance
第2个回答  2006-02-27
something which was set
第3个回答  2006-02-27
something that has been done before
第4个回答  2006-02-27
something has been done already
第5个回答  2006-02-27
sth. I've ever done
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