The vast majority of Americans (86%, according to one poll) say they support organ donation. But only 20% actually sign up to do it.

绝大多数的美国人（根据一项民意测验，有86%的美国人）表示支持器官捐献，但只有2%的人签了捐献协议。

youdao

But the majority of patients were battling multisystem organ failure, and their prognoses were not good.

但是大多数患者都是多器官功能衰竭，其预后都不是很好。

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But there's a straightforward reply, arising from the observation that the vast majority of the public support organ donation, though few get around to signing the donor register.

BBC: Viewpoint: Should organ donors get free funerals?