At the outset, it seemed necessary to be on guard against the other two.
一开始，似乎有必要提防另外两个。
Two soldiers must be on guard all night.
两名战士必须通宵警戒。
I must protect myself and be on guard.
我必须保护自己、保持警惕。
Two soldiers must be on guard all night.
必须有两个士兵整夜站岗。
We should be on guard against such people.
我们应警惕这种人。
Be on guard. There are pickpockets around here.
要提高警惕，这里有扒手。
While danger threatens, we must all be on guard.
危险正在逼近，我们必须保持警惕。
We have to be on guard against information theft.
我们必须警惕反对信息偷盗。
Thus, you should be on guard against this confused mapping.
因此，您应该谨防这种有混淆的映射。
Be on guard against those who are jealous of your success.
要提防那些嫉妒你的成功的人。
You should be on guard when a stranger comes to your doors.
当陌生人站在你家门前是，你应该有所堤防。
Consumers should always be on guard against credit card scams.
消费者必须经常提高警觉，以防各种信用卡诈骗。
Cowboys should be on guard against the attacks from wild animals.
牛仔必须提防着野兽的袭击。
And I will be on guard against two evils: hastiness and indecision.
而且我将防范两个邪恶：草率、优柔寡断。
We need to be on guard for the unexpected until the plan is fulfilled.
我们必须谨防意外直到计划圆满达成。
Be on guard against those who try to lie themselves into our confidence.
要警惕那些试图用谎言来骗取我们信任的人。
Be on guard against those who try to lie themselves into our confidence.
警惕那些用谎言来骗取我们信任的人。
The police warned people to be on guard against burglary during the festival.
警察提醒人们假日里要注意提防盗窃。
We tune out signals that should alert us to be on guard and on our feet, at home and at work.
无论在家还是在公司，我们都需要对各种信号保持警惕。
In the absence of a common goal or common enemy, they prefer to be on guard against each other.
在缺乏共同目标或共同敌人的情况下，他们宁愿相互防备。
When you have to deal with the local merchants, you have to be on guard against being strung along.
你在和当地的商人打交道时，你必须提防上当受骗。
To be on guard against theft, the school has issued regulations specifying the duties of the door keepers.
为了防止盗窃，学校已经制定规章制度，明确规定了大楼看管员的职责。
To be on guard against theft, the school has issued regulations specifying the duties of the door keepers.
为了防止盗窃，学校已经制定规章制度，明确规定了大楼看管员的职责。
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