This is a reflection of their frailty.

这是他们虚弱反映。

His frail hands could hardly hold a cup.

他虚弱手连杯子也拿不住。

The frailness of the child from the birth made her susceptible to every prevailing illness.

这个孩子天生虚弱,使她易于罹患每一种流行。

It tends to occur in persons with a hypercoagulable state (Trousseau's syndrome, a paraneoplastic syndrome associated with malignancies) and in very ill persons.

于血液处于高凝状态患者和身体非常虚弱患者。