第一，情景對話

A: I was wondering if you could give me a day off.

你能不能給我一天假？

B: What for?

為什？

A: I'll have to rewrite my thesis. That will take much time.

我得重新寫論文，那要花很多時間。

B: Stop trying to fool me. I have your number.

別想糊弄我，我清楚你的底細(xì)。

第二，詞海拾貝

have one’s number

exp. To understand or know someone or something well enough to anticipate what they will do. （心中有數(shù)，知道某人的底細(xì)）

e.g. Oh, don't worry — I won't let him cheat me. I've had his number.

哦，別擔(dān)心，我不會讓他欺騙我的。我清楚他的底細(xì)。

e.g. Oh, don't worry, I've had his number—he's a typical brat.

別擔(dān)心，我非常了解他，他是個典型的小淘氣。

e.g. I have his number. He enjoys less popularity than most other professors.

我知道他的底細(xì)，他不如其他的教授那樣受歡迎。

第三，語匯積累

take much time：花費很多時間

What for? 為何？為什么？

give someone one day off：給某人一天的請假