This is the average family in the worst off places like Congo and Afghanistan.

这是一个标准的家庭，在最险恶的地方，例如: 刚果 和阿富汗。

The worst off may need blood thinning drugs as their blood starts to harden, blocking passages.

情况最严重的患者可能需要血液稀释药物，因为他们的血管开始硬化，阻塞通道。

They enabled even the worst off to achieve the American dream.

他们甚至使最贫穷的人也能实现美国梦。

The study said the worst off are likely an underexamined kind of animal called amphibians, with 85 percent estimated to be threatened.

研究称，情况最糟糕被忽视的可能是两栖动物，估计有85%生存受到威胁。