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* @param left 左边界
，更多细节参见同城约会
研发人员的数量变动进一步揭示了行业分化的加剧——五年间，10 个行业的研发人员数量出现负增长，且这些行业主要集中在尾部；而以消费电子及电气业、汽车制造业为代表的行业，则大力扩张研发人员规模。
Online privacy is in short supply, but that doesn't make it any less important. Your data is seriously valuable stuff, and you should be doing everything you can to protect it when navigating the online world. And if you watch porn, you should be even more vigilant.