Still, within the temporal bone, the roots leave the internal acoustic meatus and enter into the facial canal.

走行于颞骨内，由内耳道底进人面神经管。

The two roots travel through the internal acoustic meatus, a 1 cm long opening in the petrous part of the temporal bone.

两支神经穿过内耳道，在颞骨的岩部有一个 1 厘米长的开口。