我的祖母身体变得越来越虚弱，需要人帮助处理日常事务。

My grandmother is becoming increasingly ___frail and needs assistance with daily tasks.

这场病让他看起来苍白而虚弱。

The illness left him looking pale and ___frail.

尽管外表虚弱，那位老学者的思维依然敏锐。

Despite his ___frail appearance, the old scholar's mind remained sharp.