letter-perfect 

/?let.??p??.f?kt/

used to describe words produced without any mistakes, or a person who is able to repeat a particular text from memory without making any mistakes

一字不差的;能一字不差地背出的;滾瓜爛熟的

His mother rehearsed his lines with him and by the time the play opened he was letter-perfect.

他媽媽跟他對(duì)臺(tái)詞，到演出開始時(shí)他已經(jīng)背得滾瓜爛熟了。

"Your German was letter-perfect," Franz said. 

“你的德語講得一字不錯(cuò)。”弗朗茲說道。

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