The sound-conducting apparatus in the middle-ear of domestic fowls includes the membrana tympani, columella, musculus tensor tympani and several ligaments.
鸭的中耳传声器官主要包括：鼓膜、听骨、张肌及韧带四部分。
2
There is huge variation in how people are affected by loud sound, however, and this is an area where a number of researchers are conducting studies.
这巨大的变化体现了噪音对人的影响有多大，然而，同时这是一个许多研究者正在努力的方向。
3
Method The position of acupoints will be located by the measurement of skin resistance and that of sound wave conducting in the Channel.