Data sets released by app developers looking to drivedownloads and smaller marketing agencies, meanwhile, have been unreliable at best.
同时，应用开发人员则希望增加下载量，他们和小型市场代理机构发布的数据集，就算往好里说，也靠不住。
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The bigger risk now is from "drive-by" downloads – malware (malicious software) that will try to infect Windows machines that visit a particular website by exploiting vulnerabilities in the browser.