比喻流通或某种活动中起主导作用的途径primary channel

• 流通领域的主渠道货源不足，已经影响了市场安排和物价稳定。

  Sources of goods in the primary logistics channel are insufficient. This has already affected market arrangements and price stability.

• 安徽省无为县劳务输出成为农民增收的主渠道。

  In Wuwei County, Anhui, the export of labour has become the primary means by which farmers increase their income.