His sudden illness upset my plan.
他突然生病搅乱了我的计划。
We are leaving tonight because of my mother's sudden illness.
由于我母亲突然生病，我们今晚就要离开。
Sudden decrease in appetite is sometimes a sign of illness.
食欲突然减退有时是生病的征兆。
她的病很突然。
Her illness was very sudden, she was well yesterday.
她病得很突然，昨天还好好的。
Her illness was very sudden, she was well yesterday.
她病得很突然，昨天还好好的。
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