The clinic's brochure explains how a blocked tear duct can cause watery eyes.

診所的手冊說明了淚管阻塞為何會導致流眼淚。

Our insurance plan covers surgery if a bile duct becomes blocked or infected.

如果膽管阻塞或感染，我們的保險方案會給付手術費用。

The pharmaceutical sales rep presented new data on treating milk duct inflammation at the meeting.

藥廠業務代表在會議上報告了治療乳腺管發炎的新數據。