一个句子: I am maxed out.我累惨了!

maxed out=tired out=worn out

max可以联想到最大值,（min最小值）所以maxed out当然表示累到了极点

第二个句子: I have got to catch some Zs!我要休息一会儿!

to catch some Zs:休息一会儿

Since we are maxed out, we have got to catch some Zs.

Z:联想——>卡通片中卡通人物在睡觉的时候,不就是用英文字母Z表示吗?

外国人想象力倒还挺丰富的哟!

I am maxed out now, so I have got to catch some Zs!

Are you maxed out? Just go and catch some Zs!

Remember:Health is wealth!