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。
I have learned many languages, but I've not mastered them the way a professional interpreter or translator has.
大多数人没有技能和时间对开发人员和专业测试人员使用的测试自动化工具精通掌握。
Most do not have the skills or the time to become proficient with the test automation tools that developers and professional testers use.
消费者行为学是一个非常专业的领域，听起来要网页设计师们精通此道确实有些悬，但是令人振奋的是，设计师们可以通过对自己或客户的网站进行大量对比测试，用他们特有的形式深入掌握该领域技能。
Consumer behavior is a specialized field and web designers can get on a steep but exhilarating learning curve for it by engaging in split testing on their own and their clients' websites.
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