She hardly ever makes the same mistake twice

Hey, Goro, what do you think of Mika, the new recruit?
Hi, kana. Well, I think she's a wonderful addition to our team, and that she will become a really valuable asset over time.
I agree. Of course, she makes some mistakes, but she is a very fast learner.
And she hardly ever makes the same mistakes twice.
Maybe you could learn a thing or two from her!
Get out of here!

recruit ﾘ ｸル-ﾄ n)新人  a new recruit 新入社員
addition ｱディｼｮﾝ n)加わった人、物《新人に対して使われる》
　a wonderful/valuable/welcome addition
　We are getting a new/welcome addition to our class.
valuable ヴァﾘｭｱﾌﾞﾙ adj)価値のある
asset アｾｯﾄn)資産、財産
over time 時が経つにつれ、そのうちに
learner ラ-ﾅｱ n)学習者　a fast/slow learner のみ込みが早い
hardly ever　めったに...しない

「同じ」same, similar, identical