Answer: Check the system clock on the user's computer.
答：检查用户电脑上的系统时钟。
Check clock is working, with correct time and alarm turned off.
检查闹钟，保证时间准确，叫醒铃声关闭。
Check out a live demo of the wondrous clock in the video after the jump.
跳转缓冲好以后，就可以看到视频里这个神奇的时钟是如何演示的啦。
Everyone has to check in at the office by nine o 'clock.
每个人都必须在九点到办公室上班。
Everyone has to check in at the office by nine o 'clock.
每个人都必须在九点到办公室上班。
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