A college education will enable me to specialize in a certain field of knowledge, such as medicine or law, preparing me to become a professional.

大学教育将使我能够专注于某些领域的知识，例如医学或法律，让我成为专业人士。

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For those looking to hire, you can post a Twitter update asking your followers if they know anyone with skills in a certain field.

如果要招聘，可以发布一个Twitter更新，询问您的追随者是否知道有人具有某个方面的技能。

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You might be a trader doing business part-time, supplementing your full-time income by putting to use your expertise in a certain field.

也许你在这行就做个兼职，利用你在某领域的特有专长赚外快(为你的全职工资添点补助)。

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If you know a lot of facts about a certain field like taxes, accounting, business start-ups, art collections, history or any topic you can think of then you could possibly become a consultant.

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The students are creating a network, motivating people to join their learning community, they are able to track inside this network who learns what faster than others, who is more knowledgeable in a certain field.

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Well, in one way that sounds like an OK idea, a single set of rules for a certain type of finance: a level playing field and all that.

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