This is probably one of the most popular professional networking sites out there.

这可能是其中一个最热门的专业网络站点在那里。

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A good start is to find out if they have an online presence, such as social and professional networking sites.

一个良好的着手点是调查他们是否在社交网站或专业网站上活动。

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Smart software vendors will take advantage of social and professional networking sites to target suitable consumer-workers.

聪明的软件生产商会利用社交和职业社交网站，瞄准相应的员工消费者。

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With this move Monster hopes to ride the popularity of social and professional networking sites that has been critical to the success of LinkedIn.

FORBES: Monster's BeKnown Stalks LinkedIn On Facebook

The sites help users tap their Facebook friends for professional networking.

FORBES: Should Job Seekers Start Using Facebook Instead of LinkedIn?