do-oh-do，是什么意思？
凌哥，今天看三年级教材有一首歌的歌词是 Hello Sarah do oh do。一直想知道，do oh do 是代表什么呢？
你好啊！
do oh do没有任何意义，是人为填入的音节，用于填补音节、节拍，制造押韵效果，增强语气，增加趣味性等。
中外歌曲中都有类似的做法。比如下面这些歌词的下划线部分（顺便点击一下播放键，听听歌曲，也不错啊！）：
《太阳出来喜洋洋》
太阳出来罗嘞 喜洋洋罗郎罗
挑起扁担郎郎采光采 上山岗罗郎罗
手里拿把罗来 开山斧罗郎罗
不怕虎豹郎郎采光采 和豺狼罗郎罗
悬岩陡坎罗来 不稀罕罗郎罗
唱起歌儿郎郎采光采 忙砍柴罗郎罗
走了一山罗来 又一山罗郎罗
这山去了郎郎采光采 那山来罗郎罗
只要我们罗来 多勤快罗郎罗
不愁吃来郎郎采光采 不愁穿罗郎罗
《春天里》
春天里来百花香
郎里格朗里格朗里格朗
和暖的太阳在天空照
照到了我的破衣裳
朗里格朗 格朗里格朗
穿过了大街走小巷
为了吃来为了穿
昼夜都要忙
朗里格朗 朗里格朗
没有钱也得吃碗饭 也得住间房
哪怕老板娘作那怪模样
朗里格朗里格朗朗里格朗
英语中也有，比如：
《Old MacDonald Had a Farm》
Old MacDonald had a farm, e i e i o
And on his farm he had some cows, e i e i o
with a moo moo here and a moo moo there
here a moo there a moo
everywhere a moo moo
Old MacDonald had a farm, e i e i o
《Yesterday Once More》
when i was young i'd listen to the radio
waiting for my favorite songs
when they played i'd sing along,
it make me smile.
those were such happy times and not so long ago
how i wondered where they'd gone.
but they're back again just like a long lost friend
all the songs i love so well.
every shalala every wo'wo
still shines.
every shing-a-ling-a-ling 
that they're starting to sing 
fine是什么意思
so fine
when they get to the part
where he's breaking her heart
it can really make me cry
just like before.
it's yesterday once more.
(shoobie do lang lang)