The skill of speaking a foreign language takes time to acquire.
讲一种外国语的能力需要花很长时间才能获得。
One of the most difficult skills to acquire in a foreign language is the ability to understand the natural language spoken by native speakers at a normal speed.
一门外国语最难掌握的一项技巧就是听懂母语讲话人用正常速度所说的自然语言的能力。
Master a foreign language; acquire proficiency in reading professional written publications in foreign language.
掌握一门外语，能熟练地阅读本专业的外文书刊。
You must work hard to acquire a good command of a foreign language.
你必须努力用功，才能具备有良好的外语能力。
You must work hard to acquire a good command of a foreign language.
你必须努力用功，才能具备有良好的外语能力。
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