1)据 according to
例:据我所知,她没来过中国。
As far as I know, she's never been to China before.
例:据统计,学习中文的外国人越来越多。
According to statistics, the number of foreigners studying
Chinese is increasing all the time.
2)反正 anyway, regardless
例:不管他怎么说,反正我不相信他的话。
It doesn't matter what he says; regardless, I don't believe a
word he says.
例:不管天气好不好,反正我今天哪儿也不去。
It doesn't matter what the weather is like; regardless, I'm not
going anywhere today.