HAPPY DAY IN AND DAY OUT

HAPPY DAY IN AND DAY OUT
HAPPY DAY IN AND DAY OUT

HAPPY DAY IN AND DAY OUT
就是天天快乐!
day in and day out,就是指每天,天天的意思

快乐每一天
http://dict.youdao.com/search?q=day+in+and+day+out&ue=utf8&keyfrom=dict.index

Day in and day out or day in, day out
天天，无变化，无休止的
天天开心的意思吧

快乐天天输出