比较难

rather difficult

→ 比较
phrase Rare #29,317
rather difficult 比较 softens or qualifies 难, meaning something is fairly or relatively difficult.
CH: 这本书比较难,我需要慢慢看。
EN: This book is rather difficult, so I need to read it slowly.

这一题比较难不是背公式就可以解的

This problem is quite difficult; you can't solve it just by memorizing formulas.

— 那些年,我们一起追的女孩 (2011)

这部分比较难

This part is relatively difficult.

— 怒火青春 (1995)

比较难了!

This is getting pretty hard!

— 色‧戒 (2007)