迂回管道用于引导气体或液体绕过其它管道或装置的一种管道或渠道 A pipe or channel used to conduct gas or liquid around another pipe or a fixture.
湍急的水道这样一股水流的渠道 The channel of such a current.
层次字节、元素、渠道或一行信息 A bit, an element, a channel, or a row of information.
不要直接向我提意见；你得通过适当的渠道，即写信给总店，一个副本给经理，一个副本给我；这样你的意见就可能得到受理。 Don't come to me with your complains; you've to go through the proper channels, which means a letter to Head Office and a copy to the director and to myself, then you might be listened to.