The pinna is the visible part of the ear, just right for grasping naughty boys by.
耳廓是耳朵明显可见的一部分，非常适合用于抓住淘气的小男孩。
2
The outer ear (the pinna) receives a single sound wave composed of different sounds.
外耳(耳廓)收集含不同声音的单声波。
3
Directivity and sound diffraction of the pinnaof the Megaderma spasma are studied to predict the the role of these outer ear extensions in the biosonar system.