Cleft palate: Fairly common congenital disorder in which a fissure forms in the roof of the mouth.

颚裂：一种常见的先天性疾病——胎龄两个月时颚板未能融合而遗留裂隙。

youdao

This forces water through a tube formed by the tongue pressed against a groove in the roof of the mouth.

这迫使水流过一条由舌头压在上颚的沟槽部分形成的管道中。

youdao

To make this sound, my tongue comes up, but not too much because this does not touch the roof of the mouth.

发这个音时，我的舌头抬起，但不会抬得太多，因为舌根不碰到上颚。

youdao

Chomping into one of these piping hot dumplings will inevitably have you scalding the roof of your mouth, but it is all part of the experience.

BBC: Japan��s spirited third city

My 13 yr old golden, Lacie, was diagnosed with a fast growing fibrosarcoma tumor in her mouth that was so advanced it had already grown into her nasal cavity and was an extremely large mass located in the roof of her mouth.

FORBES: When A Pet Has Cancer Part II