that no human has ever said before on earth.

那些世上从未有人说过的句子
Would anybody volunteer to say a sentence,

有没有人自愿说个句子
non obscene, non derogatory,

不能是下流的不敬的
that has never been spoken before on earth, ever?

得是世上从未有人说过的句子
Here. I'll start.

我先来说一个吧
"It's surprisingly easy to get a purple tie on eBay

"如果你不是很在意质量的话
if you don't care much about quality."

那么在易趣买条紫色领带是非常容易的"
I could imagine no one else in the world has said this before.

我可以想象此前世上并无他人说过这话
"I am upset

无法从iTunes上
that one cannot easily download

轻松下载《吸血猎人巴菲》
'Buffy the Vampire Slayer' through iTunes."

让我感到很失望
Now it's possible somebody said both these sentences before,

有可能某人曾说过这两句话