求翻译：谷歌大量开发免费网络应用，这样会吸引最多的用户群体，以便网络广告业务的开发，简单来说就是用人气换广告的模式。谷歌的软件开发本身以开源软件为主，开发成本较低；加上各种应用基本上都是免费的，适合对软件本身功能和安全性要求不高的用户，也就是大部分用户，这样可以巩固发挥谷歌本身网络优势。是什么意思？

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The valley song massive development free network application, can attract most user community like this, in order to the network advertisement service development, simply speaking is trades the advertisement with the human spirit the pattern.Gu Ge the software develops the itself start source softwa

Google a lot of development free Web application, which will attract the largest number of users groups, so that the development of online advertising, it simply is to use ads-for-popularity model. Google's software development itself is open source software, and lower development costs, coupled wit

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