统计学是一门很难精通的科学。
英语是一门容易学但是难精通的语言。
English is a language easy to learn but difficult to master.
有什么你是不精通的吗?。
俄语是门难以精通的语言。
熟悉熟悉、精通的状态；
编程和界面设计是两种不同的技能，两者都精通的人是很少的。
Programming and human interface design are separate skills, and people good at both are rare.
其一是我们自己精通的问题，其二是我们知道在哪里可以找到关于某问题的知识。
We know a subject ourselves, or we know where we can find information upon it.
我的预言是：苹果的平板将会是一个什么都会但没一样精通的设备（Jack of alltrades master of none）。
My prediction: Apple's tablet will be Jack of trades and master of none.
佩奇十分精通多种风格的爵士乐。
我的朋友精通英语。
你知道，我对我的工作非常精通，而且我自己也全心投入。
You see, I understand my work thoroughly, and attend to it all myself.
学会如何运用它们和对它们精通会花费大量的时间。
It takes time to learn how to apply them and become proficient with them.
它们提供了许多精通事物的方法。
它要求应用程序的编程人员非常精通安全。
It requires the application programmer to be well-versed in security.
但是，大多数的公司似乎仍然没有十分精通于该领域。
But most companies still don't appear to be well versed in this area.
第二，要精通你的工作。
避免自夸的措辞，例如“精通，出色，杰出。”
Avoid self-flattering terms such as "highly skilled, outstanding, or excellent."
精通你所做的。
这两个人都很精通阿拉伯语，并且在中东有过数十年的工作经历。
Both men are fluent in Arabic and have decades of experience in the region.
海伦精通音乐，而她的丈夫擅长绘画。
Helen is adept in music and her husband is adept in drawing.
精通你工作时必需的技术和工具。
Become an expert in the skills and tools necessary to do your job.
他们精通好的书信格式。
人们知道鲁斯之前棒球比赛的流行风格是科学打法或称精通战略和技术的打法。
Pre-Ruth the prevalent style of play was known as Scientific Baseball or Inside Baseball.
不管你对历史多么精通，历史总有它不为人知的一面。
No matter how good at history you are, there will still be a hidden side of it you just never knew.
不管你对历史多么精通，历史总有它不为人知的一面。
No matter how good at history you are, there will still be a hidden side of it you just never knew.
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