I have learned many languages, but I've not mastered them the way a professional interpreter or translator has.

我学过许多语言，但我还没有像专业的翻译人员那样精通这些语言。

youdao

If they do this, it shows they have not mastered it.

如果那样，就表明他们并没有掌握这种语言。

youdao

He had not mastered the detachment so necessary to the Jedi order.

他未能拥有对于绝地武士而言，更为必要的超然态度。

youdao

If the person has not mastered the basic concept, the person must fail, must get four or less.

如果他没有掌握基本的概念，那就一定不能通过考试，只得十分之四或更少。

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More than one CEO I know of has not mastered finance.

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But as the value of data is not yet mastered, the goal should not be to tax data collection per se.

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He had not only mastered the writings of Adam Smith, but had also practiced the art of the creation of the wealth of nations.

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