To the Spring and Autumn Period, with the emergence of the seal, seal gradually became a specialized skill.

到了春秋时期，随着印章的出现，篆刻逐渐成为专门的技艺。

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An area of specialized skill or knowledge, especially academic or vocational, that is related to but separate from other areas.

具有特殊技能或知识，尤指学术上或职业上的分区，与其他分区相联系但又有区别。

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Our company have the customer's good reputation because of our specialized skill, stable quality, best service and reasonable price.

公司以专业的技术水平，稳定的产品质量和优质的客户服务深受海内外客人好评！

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Anti-terrorism is the purview of very small numbers of people with very specialized skill sets, and these people are, understandably, extremely leery of overt publicity.

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Driving brand equity with an online publishing operation borrows from traditional marketing and media disciplines, but in practice has already become a highly specialized and evolving skill.

FORBES: Why The Brand Content Trend Is One Marketers Can't Bypass

You need a specific, specialized, precise, particular skill.

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