a minor illness的用法和样例：
- Later, when I was in the hospital due to a minor illness, Alexi came to visit me.I told him stories of my childhood in Hong Kong.
- A minor road connects the highways.
- He is going in for a minor operation.
- She played a minor role in the opera.
- She acted as a minor role in the play.
- A minor key, scale, or interval.