You need some proficiency in book-keeping for this job.这份工作要求熟悉簿记。

She also acquired some proficiency in French, Italian and German.她还通法语、意大利语和德语。

their proficiency at ice-skating他们滑冰的熟练程度

Evidence of basic proficiency in English is part of the admission requirement.英语基本熟练是录取条件之一。