He is critically ill in intensive care.
他病得很重,正处于特护之中。
If she gets ill again it could prove fatal.
如果她再患病,就会有性命之忧。
We were given to understand that he was ill.
我们获悉他生病了。
She flew to their bedsides when they were ill.
她在他们生病时飞奔到他们的床边。
Body temperature can fluctuate if you are ill.
如果你病了,体温会波动。