翻译和例句：
接触到各种各样的人。)on one's toesMeaning: alert, ready to act 警觉的，随时准备行动的Example: Gill's always asking difficult questions - she really keeps me on my toes. (基尔总是问我些难题，她搞得我时刻保持警觉。) ……
(警觉的) and doubt (怀疑) everything. D: You are very simple and honest (诚实的). It’s very easy for others ……
the sleep they need.They keep them alert (警觉的) all the time.They make raising chicks less stressful (有压....They keep them alert (警觉的) all the time.They keep them alert (警觉的) all the time.They make raising chicks ……
nicely, you’ll listen to them.C. It’s not easy to fool you. You are always alert (警觉的) and doubtful of almost everything.C. It’s not easy to fool you. You are always alert (警觉的) and doubtful ……
to stay alert (警觉的).On average (平均), the penguins sleep 4 seconds at a time. But they sleep for a total... have a very short sleep to stay alert (警觉的). ……
a program designed to make communities safer.2.The sign uses alert (警觉的) South African meercats ……
鳄鱼有睁一只眼睡觉的神功！For humans, “sleeping with one eye open” usually means to stay alert (警觉的). After all, not too many of us can really do that. However, Australian scientists found that crocodiles (鳄鱼 ……
词，表示“警报，警示”。还可作形容词，表示“警惕的，警觉的，机敏的”等。Alert to为固定搭配，意为“留意，对……警惕”。例句：We must be alert to the hidden danger. (我们必须警惕潜在的危险。）Alert作名词，表示“警报，警示”。还可作形容词，表示“警惕的，警觉的，机敏的”等。Alert to为固定搭配，意为“留意，对……警惕”。例句：We must ……
survive 生存survive 生存wakeful 警觉的wakeful 警觉的perfect 完美的perfect 完美的reasonable 合理的reasonable 合理的 ……
. The garbage needed to fit inside of a 700-milliliter bottle.I was highly alert (警觉的) that day. I thought... alert (警觉的) that day. I thought about what waste every action would produce. When I solved math problems ……
. For example, people are more alert (警觉的) when they hear sounds from the back. Also, sounds...的) studies pointed out. For example, people are more alert (警觉的) when they hear sounds from the back ……
very short sleep to stay alert (警觉的).The penguins sleep like this because they need to protect... sleep to stay alert (警觉的).Strange animal sleeping habitsStrange animal sleeping ……
stop working. Even when we are asleep, our ears are still working. They help us stay alert (警觉的... working. They help us stay alert (警觉的) for any unusual sounds. But ears do more than just hear ……
in shopping – it’s hard to beat the happiness of making a wonderful ______ (8).Being alert (警觉的)is really ……
(信任) strangers.Chinese people are more vigilant (警觉的) to strangers because they are afraid to get hurt ……
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