颊窝毒蛇的毒牙是长的空心管子。
The fangs of pit vipers are long , hollow tubes .
另外还涉及美容方面的治疗项目，包括唇形态修整、颊窝成形等等，内容广泛。
Still involve the remedial item of hairdressing respect additionally , include figuration of labial configuration nap , buccal nest to wait a moment , content is extensive .
颊窝