In Guangxi Zhuang Autonomous Region, the regional meteorological authorities have issued a blue alert for the typhoon and a blue warning for downpours.

在广西，自治区气象部门发布了台风蓝色预警和暴雨蓝色预警。 ?。

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In experiments, people exposed to blue light become less sleepy and more alert.

在实验中，身处于蓝光中的人的睡意总是较少，表现得更警觉。

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When your eyes are exposed to it directly, the blue light halts production of the sleep-inducing hormone melatonin and makes you feel more alert.

当眼睛直接受到刺激时，就会阻止产生诱导睡眠的褪黑激素，你整个人就会保持清醒状态。

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Were I to pull an all-nighter, I could also switch Hue to blue to stay alert.

FORBES: The Best Product of 2012: The Philips Hue LED Lighting System

The Blue Jays said Happ was taken to Bayfront Medical Center, where he was alert and undergoing tests.

NPR: Jennings, Rays Shaken By Happ Getting Hit In Head

She wore a blue hairnet, had a tube in her throat, and lay under a white blanket, appearing alert, the Associated Press reported.

BBC: New York nanny Yoselyn Ortega denies murder charges