belly什么意思,jellybelly

where is baby's belly button?宝宝的肚脐眼在哪里?
belly是什么意思(belly是什么意思中文)
来看权威字典的解释没有一个词不认识吧,但是belly up 是什么意思呢?
his belly button! and he kept on singing his song: 它的肚脐眼!
head$neck musclesepicranius galea aponeurotica frontal belly