Some unfortunate person passing below could all too easily be seriously injured.

某个正好从下面路过的倒霉的人会太容易严重受伤。

Older drivers are more likely to be seriously injured because of the fragility of their bones.

年纪较大的司机因骨骼易碎而更可能会受重伤。

He isn't seriously injured but he is in (a state of) shock.

他伤得不重，但处于休克状态。

Luckily nobody was seriously injured.

幸运的是没人受重伤。

Seriously injured, he had to be taken to hospital.

由于伤得严重，只好把他送往医院。