extra-channel

基本解释

Even if extra channel space is available --- it is usually not enough for the very wide bandwidths of HDTV.
即使有额外的信道空间---一般也不够大带宽的HDTV使用。
The extra channels offered on the optical fibre network are mostly additional pay-per-view movie channels and an international home shopping channel.
用光纤网络收看节目的观众则可观看更多自选节目和一个购物台。
My extra earnings came in very handy.
我的额外收入可备我不时之需。
This extra strong glue should do the job nicely.
这种超强度胶应该管用。
She decided to rent out a room to get extra income.
她为获得额外收入决定租出一个房间。