PC 121是一款挂耳式单耳通讯耳机，是廉价互联网电话和笔记本的理想选择。
The PC 121 is an over the ear monaural headset, ideal for inexpensive Internet telephony and laptop use.
入电极，麻痹系统内的单神经元，甚至在他们耳槽内植入微小的耳机。
The bats' nervous system, anesthetizing single neurons of the system, and even1 It might help him to discover.
入电极，麻痹系统内的单神经元，甚至在他们耳槽内植入微小的耳机。
The bats' nervous system, anesthetizing single neurons of the system, and even1 It might help him to discover.
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