“下颚骨”造句

人体最硬的骨头是下颚骨(颔骨)?
The hardest bone in the human body is the jawbone.

龟龟的耳鼓膜通常在下颚骨的后边.
The ear scales , the tympanic membranes , are the two large'scales'just behind the jaw - bone.

• #下颚骨