F1 tyres have an optimum operating temperature, and when they drop below that they rapidly lose grip, which dramatically slows lap times.

F1赛车的车胎对环境温度有要求，当温度低于底限时候轮胎就会失去抓地力，这会大大减慢圈速。

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The mounting, placing, and operating of lighting equipment are handled by electricians. Grip men are responsible for moving scenery and camera equipment.

照明师负责安装，操作照明设备。管理布景的置景员负责搬动布景和摄影设备。

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According to IDC, BlackBerry 10 is set to battle it out with Windows Phone 8 for the No. 3 smartphone operating system worldwide in 2013, behind Android and Apple's iOS. While its grip has slipped in North America, BlackBerry has maintained a strong presence in such far-flung places as Indonesia, Nigeria, South Africa, Mexico and some South American countries.

CNN: With BlackBerry 10, struggling phone maker eyes comeback