fairly 作副词相当怎么用 It's fairly too small

fairly（作为副词,用于形容词和副词前）
1.一定地,相当地
a fairly easy book 一本相当浅易的书
I go jogging fairly regularly 我差不多经常练习短跑
2.公平合理地,公正地
He has always treated me very fairly
他待我一直很公正
3.（用以强调）简直,竟然
I fairly jumped for joy
我简直高兴地跳了起来
Ps：“It's fairly too small ”中,有两个副词 “fairly”和“too”,虽然“fairly”可以修饰副词,但此句中,是两个副词修饰了一个形容词“small”,是不对的~可以去掉一个副词~