"gugu" in Chinese (Simplified)
咕咕（无特定含义；婴儿咿呀声）
Definition
一个俏皮或无意义的词，常用来模仿婴儿发出的声音或作为婴儿发音。它在英语中没有标准词义。
Usage Notes (Chinese (Simplified))
主要在和婴儿、幼儿互动时用，类似英文'goo goo'。不用于正式场合。
Examples
The baby kept saying gugu and smiling.
宝宝一直说着**咕咕**并且微笑。
She played peekaboo and said gugu to make her nephew laugh.
她玩捉迷藏时说了**咕咕**逗侄子笑。
Sometimes, people use gugu in songs for babies.
有时人们会在婴儿歌曲里用到**咕咕**。
Whenever his mom tickled him, he'd giggle and shout gugu!
每次妈妈挠他痒，他都会咯咯笑并大喊**咕咕**！
That toddler loves saying silly things like gugu and baba all day long.
那个小孩整天喜欢说些像**咕咕**和**爸爸**这样傻乎乎的话。
Don't worry if you hear your baby babbling gugu—that's normal for this age.
如果你听到你的宝宝咿呀说**咕咕**，不用担心——这个年纪很正常。