But the weak old man didn't give up his struggle though the ending is a failure.

但弱小的老人并不因对方的强大而放弃抗争，即使最终也是失败！

youdao

Look at him now, a tired, weak old man; it's difficult to imagine that he was once a great athlete.

看看他，一个疲惫，虚弱的老人，很难想象他曾经是个出色的运动员。

youdao

His father is a weak small spare old man.

他父亲是一个瘦弱的小老头儿。

youdao

He is an old,weak man and his case is severe.

VOA: special.2009.08.01

Mr. MEYERS: Well, I suppose the simple power of the theme and the idea that a man who is weak and poor and old, and has gone through tremendous physical hardships, including having his hands sort of torn up by the rope and the struggle, does in fact endure, and prevail, even though he's lost what he's fought for, because the sharks have eaten the marlin.

NPR: The Enduring Depths of 'Old Man and the Sea'

The old man put his fingers on her wrists to feel her pulse and said her kidneys were weak.

NEWYORKER: The House Behind a Weeping Cherry