你应该每天做两次眼保健操，并及时检查眼睛。
You should do eye exercises twice a day and examine your eyes in time.
在不到两年的时间里至少形成了三个联盟，目标都是建立适于所有机型输入的移动手机操系统。
In less than two years, no fewer than three coalitions have formed with the intent of building mobile handset operating systems with input from all comers.
两分钟的眨眼操结束后，请在心里记住眼睛感觉如何，是紧张、放松还是疲劳。
After you have done this for two minutes, mentally take note of how your eyes feel, are they strained, relaxed, tired.
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