I can speak from experience.

我可以从自己的经历说起。

youdao

I speak from experience here.

现在我来说说自己的经历。

youdao

I speak from experience.

凭我的经验来讲。

youdao

I can speak here from personal experience. If you look me up on Guenter Lewy, Armenian genocide and you look at some of the blogs, you will find a lot of vituperation: you are called a genocide denier on a par with holocaust deniers."

VOA: standard.2010.03.18

The problem is that before you can speak from experience you may have to max out your credit card.

WSJ: Luxuriously Liquored

So I speak from experience when I say that, for most emotionally normal adults, sustained fandom requires the perpetual renewal of the hope that next year, your guys just might win it all.

FORBES: Super Bowl Smack-Talk, Take Three: Are Dynasties Good for the NFL?

And I speak from experience.

FORBES: Oracle Swings for the Clouds. . . and Misses