12-商谈-08叙述询问理由-lesson04

你怎么在这儿?
Why are you here? *根据说话方式的不同，有时会让对方听起来不礼貌。
我告诉你为什么……
I'll tell you why...
This is the reason why...
总之，是这么回事儿。
In brief, it's like this. *比较随便的说法，用在说出重点之前。虽然不是正式的说法，但可用于所有情况。
In short, it's like this.
In a word, it's like this.
To sum up, it's like this.
它的由来是这样的……
It started like this...
How did Edison make the light bulb? (爱迪生是怎样发明灯泡的呢?)
It started like this... (它的由来是这样的……)
This is its history...
This is the way it began...
原来如此!
That's why! *比较随便的说法。
Why doesn't it work? (为什么不动呢?)
You have to turn it on first. (你得先打开开关。)
Oh, that's why! (哦，是这样啊!)
所以……
That's why...
That's why I like her. (所以我喜欢她。)

I see. (我明白了。)