Last year, North Korea threatened to turn Washington into a sea of fire.

去年，朝方曾发出警告，称将让华盛顿变成一片火海。

Burning material fell over the threshold as he tried to step inside into a sea of fire.

当他刚要一头冲进火海时，燃烧着的碎片轰然落到门槛上。

It thundered, and bright flashes of lightning now and again shot across the sky, turning it into a sea of fire.

雷声隆隆，电光闪闪，整个天空好像着了火。