officialchannel

例句：

1. 1. The official channel forupdates is the company's website.
   更新的官方渠道是公司的网站。
2. 2. They usedthe official channel to communicate with the governmentofficials.
   他们使用官方渠道与政府官员沟通。
3. 3. The official channel was closed due totechnical difficulties.
   由于技术问题，官方渠道被关闭了。