How do you know it's funny or not?

怎么会知道笑话好笑呢？

youdao

You know it's funny. I've been learning English for 12 years and not until yesterday did I know how to sa toilet paper.

你知道我学了十二年英语(english)，可直到昨天我才知道卫生纸怎么说。

youdao

It's a funny sensation to know someone's talking about you in a language you don't understand.

知道有人正用一种你不懂的语言谈论你，这种感觉真奇怪。

《柯林斯英汉双解大词典》

You know, it's funny whata young man recollects, 'cause I don 'tremember being born.

VOA: standard.other

It's funny when I e-mail people. I have one finger, you know.

我给别人发电子邮件很可笑。我用一根手指打字，你知道。

现在的孩子好可怕 - SpeakingMax英语口语达人

You know, it's funny.

这说起来很有意思。

经济危机也能避开 - SpeakingMax英语口语达人

Ms. DICKINSON: And you know it's funny because the baseball metaphor, I've had this really strange career, and one of the things I say - and this works for college, too - is man, you know, I try 10 things.

NPR: Ask Amy: Responding to the Thin Envelope

You know, it's funny, " says the A-lister, "I can't think of female executives' husbands, but I can recall male executives' wives.

FORBES: Magazine Article

You know, it's so funny.

NPR: Tift Merritt Will 'See You On The Moon'