to be alert for的意思|示意

He enjoined me to be alert all the way for fear to catch a cold at night.

他嘱我路上小心，夜里要警醒些，不要受凉。

He's telling his young clients to get a good night's sleep for several days before the test so they'll be alert at the 7:45 a.m. start and to take high-energy snacks to eat during bathroom breaks.

为此，他告诫自己那些年轻的学员，考试前几天一定得好好睡它几晚，这样到考试那天还可以在早上7点45分一跃而起。 考试中间休息（让考生上盥洗室）时，还要抓紧时间补充一点高能快餐食品才行。

It would also constantly monitor the person's condition and any change - a dramatic rise in heart rate for example - would signal an alert that action needed to be taken.

并且该系统会不间断的监视伤者的身体条件，任何的变化，比如心跳的急剧加速，那么系统将会给出警报信号——当前的动作应该被取消。

But, not all the messages and changes are intended for the user; some are part of the page's operation, and it would be inappropriate to alert users to them.

但是，并非所有的消息和更改都是面向用户的；其中一些是页面的操作，而将这些事件通知给用户是不合适的。

They want to be on the alert for similar buying opportunities.

他们要准备应对类似的购买机会。

Notification can be configured to send alert based on warning or alarm to administrators for corrective measurements.

可以根据警告或警报向管理员发送通知，提醒他们采取纠正措施。