Pcmm
abbr. pulse code modulation multiplexer 脈碼調制多路復接器，脈碼調制復用器
??? 情景例句
What's the problem, Richard?
有什么問題嗎 Richard
The phone is ringing.
來電話了。
I'd like to get this film developed.
我要沖洗這卷膠卷。