你们应该在课堂上保持活跃。
明智选择，保持警醒。
晚上要保持警惕！
You must keep alert in the English class.
你们应该在英语课上保持活跃。
Keep moving, keep low, keep quiet, keep alert!
保持移动，保持低调，保持安静，保持警戒！
When it comes to a long drive, make sure to have ways to keep alert.
当长时间驾驶之后，一定要想办法保持清醒。
You must keep alert when you are in a completely unknown environment.
在一个完全陌生的环境里，你必须随时保持警惕。
Keep alert to the information of related party when inspecting records or documents.
在检查记录或文件时对关联方信息保持警觉。
Also keep alert for Australian building approvals on Wednesday and PMI data out of China on Thursday despite a national holiday.
请同样关注澳大利亚定于周三出炉的营建许可，还有中国将于周四揭晓采购经理人指数，虽然接下来将迎来国庆假期。
The key to staying alert and awake on the job is to keep your chi moving.
在工作中，保持警觉和清醒的关键是让你的“气”运动。
Keep a detailed mailing list to alert customers about new products or business happenings, and explore the marketplace for unique opportunities.
保持一个详细的邮件列表以提醒客户关于新产品或新业务的推出，并研究市场中的稀缺机会。
Present somber news with a more serious expression. To communicate interest in your listeners, keep your expression alert and friendly.
你的面部表情应当自然地与信息相配合地作出相应改变，说到严肃的问题时要有更严肃的表情，与听众谈判兴趣时则要保持机敏、友好的表情。
After Palmer accuses him of endangering Elizabeth Nash, Jack begs the candidate to keep his security at high alert because two other suspects are still at large.
在帕默指责杰克危及了伊丽莎白的安全之后，杰克恳请帕默保持他的警卫处于高度戒备状态，因为其它2名杀手还未被捕。
If pilots keep getting unnecessary alerts, they will tend to ignore them.If an alert is not issued when it should be, however, the result can be a mid-air collision.
如果它不断发出“狼来了”的警告，飞行员将会逐渐无视它的存在，反之，如果紧急关头警报没有及时发出，后果可能是撞机。
You have to be intellectually engaged when you read, and this can keep your mind sharp and alert.
当你在看书的时候，你要全神贯注，那样才能使你思维清晰敏锐。
Try it out next time you need to drive your car. Cover your left nostril with your thumb and breathe only through your right nostril for one minute. This should keep you more alert when driving.
下次开车时你就可以试试，用拇指压住左鼻孔只用右鼻孔呼吸一分钟，这样能够提高你驾驶的警觉性。
Some caterpillars also make drumming sounds to keep their attendant ants alert.
有些幼虫甚至发出鼓声用以警示蚂蚁。
The goal is to keep drivers alert and decrease their frustration while they have to keep to a lower speed limit.
它的目标是保持司机警惕，当他们不得不保持一个较低的速度限制时，降低他们的失落心情。
In addition, I had two cups of coffee, eight pieces of chocolate, and a handful of snacks to keep myself alert and focused!
为了集中精力，我喝了两杯咖啡，吃了8块巧克力和少量饼干。
Eclipses bring dramatic news, but keep in mind that even sudden reversals can now be used to turn the tables in your favor if you stay alert.
月食带来戏剧性的消息，但是注意，如果你能保持警惕，即使是突然的逆转现在也可以用来作为对你的利好。
Eclipses move us out of ruts, get us more excited or alert - in short they do whatever they have to do in order to keep us moving forward.
蚀会使我们偏离轨道，让我们更亢奋或更警惕——简而言之，它们会做任何事以使我们继续前进。
Keep your body posture alert and confident.
保持体姿的警惕和自信。
It can banish fatigue, keep you alert, improve your motor performance, and enhance your senses.
它能清除疲劳，使你清醒，令你开车时更专心和提高你的判断力。
In the study period, I will be able to consciously practice the knowledge used to "independent thinking" as its motto, always keep in mind alert.
在学习期间，我能自觉将所学知识用于实践当中，以“独立思考”作为自己的座右铭，时刻不忘警戒。
You need to be alert, keep calm, think clearly, act decisively.
你必须时刻警惕，头脑冷静，思维清晰，行动果敢。
To keep customers satisfied universities like Arizona State send text message to students that alert them when their laundry is ready.
为了保证顾客满意，亚利桑那州立大学会给学生发短信提醒他们的衣服已经洗干净了。
To keep customers satisfied universities like Arizona State send text message to students that alert them when their laundry is ready.
为了保证顾客满意，亚利桑那州立大学会给学生发短信提醒他们的衣服已经洗干净了。
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