We didn't know that the reactor was still burning and radiation was still spreading.

我们当时并不知道反应炉还在燃烧 辐射也继续扩散中。

To limit their exposure to radiation, the miners dig 12 meters down before making their way over to the burning reactor.

为了让矿工暴露的辐射降到最低 他们挖掘到12公尺深才开始往燃烧中的反应炉前进。

After that, for days, thousands of tons of clay, sand, boron, and dolomite, were dropped by helicopter into the burning reactor to quell the fire, but also to try and prevent the spread of radiation.

在那之后的几天里，成千上万吨的粘土，沙子，硼和白云石，被直升机抛进燃烧的反应堆中以扑灭大火，并试图阻止辐射的扩散。