What if the whole world is covered in water如果全世界被水淹没了

Stan: Even if there is a global disaster, you can’t store clover like that.

Stan: What if the whole world is covered in water?

Stan: Don’t you have someone else you can annoy?

even if 即使
Even if I fail this time, I would try again. 
即使我这次失败了，我还要再试试。

disaster n. 灾难；灾祸；天灾
The floods were a disaster.
洪水是一种灾害。

what if 如果……将会怎么样
What if the boy's parents should die? 
如果那男孩的父母死了该怎么办呢？

cover vt.(常与with连用）盖；覆盖
She covered the table with a cloth.
她用一块布把桌子罩起来。

annoy vt. 使烦恼；使生气
These flies are annoying me.
这些苍蝇真让人讨厌。
【参考译文】
Stan: 即使有全球性的灾难，你也不能那样储存苜蓿。

Stan: 如果全世界都被水覆盖了,你怎么办？

Stan: 你不能去惹惹别人吗？