奶奶年纪大了，身体变得很虚弱。

Grandma has become quite ___frail as she's gotten older.

这些玻璃杯非常易碎，搬运时要特别小心。

These glasses are too ___frail to handle without extra care.

面对金钱的诱惑，他承认自己意志薄弱。

He confessed to being ___frail when tempted by money.