a tear duct的用法和样例：
- She is mending a tear in her dress.
- Wiping a tear away,she took a sip.
- Just then she saw a tear roll down Grandma's cheek.
- An opening, a tear, or a rupture.
- There's a tear in the arm of my jacket.
- A tear plopped down onto the page she was reading.
a tear duct的相关资料：