pp1-114

forevergloria

114. In physics, sound is considered to be

    the waves of vibratory motion, nether or

    not they are heard by the human ear.

C错了，看不懂，是单词拼错了还是其他的问题？

thx~~~

sunweiyuan

应该是拼写错误，题目应该是neither吧

改成wheather or not