Last May, during a big popularity spike, Twitter experienced regular service outages; users were greeted with a picture of a cat at a computer during these down stretches.
去年5月，正当社会各界为其一致叫好时，Twitter经历了一次常规的服务中断；期间，用户发现首页图片被换成了一只猫。
The advantages of using regular laser pulse spikes for drilling and the selection of pulse spike parameters are discussed.
分析了采用规则激光脉冲尖峰序列打孔的优点及脉冲尖峰参数的选择。
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