Don’t get your knickers in a twist! It’s not the end of the world.

别烦恼了，这并不是世界末日。

After Sputnik, megadeath would arrive in minutes by rocket, non-negotiably, and in such quantities that global annihilation looked on the cards.

杀伤规模之大甚至发世界末日。

Lensman. E.E. "Doc" Smith. Classic space opera with pure-as-Boy-Scout heros and unrelentingly evil bad guys fighting for control of planet-squishing "doomsday devices."

透镜人》（科幻）——E.E.·史密斯"博士"经典的太空歌剧，讲述了男童子军般纯朴的英雄和无情的邪恶坏蛋为湿行星的“世界末日装置”的控制而战斗。

Let him not quit his belief that a popgun is a popgun, though the ancient and honorable of the earth affirm it to be the crack of doom.

学者应该坚持自己的信仰：气枪的一响不过是啪的一声而已，尽管那者与位者断定它是世界末日的霹雳。