a television station 电视台◆The programme was shown on Channel 4. 这节目在第四频道播放。◆a free-to-air channel (= one that you don't have to pay for) 免费电视频道◆a cable channel 有线电视频道
a method or system that people use to get information or to communicate 途径；渠道◆Complaints should be made through the proper channels. 投诉应该通过正当途径提出。
() ( ˈsales ˌchannel) a way in which a company makes its products available to customers 渠道（公司将产品供应给顾客所经过的途径）◆developing new marketing channels 开发新的营销渠道◆Banks often act as a channel for selling insurance. 银行经常成为推销保险的渠道。