盐电阀门苏州有限公司:"Be happy in"啥意思?

"Be happy in"啥意思? 谁知道歌词中是"Happy，It`s nice to be happy，Sha la la,everybody should be happy"这首歌叫什么 Be Happy 是什么意思? 有"be dressed in" 的结构吗,是什么意思 qu!!!!!!!!!! I think if us go the way with our dream,we can be very happy in the future. 常常听到女杰6或韩国综艺节目的插曲有句是“should be happy" Q1: why it happens to be "apple" in "adam's apple"???? Qu Enpei is quite a s___ in making a robot. “happy"什么意思？