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。
We must be on guard against hidden enemies.
我们必须警惕暗藏的敌人。
Be on guard. There are pickpockets around here.
要提高警惕，这里有扒手。
Be on guard. There are pickpockets around here.
在公共汽车上要谨防扒手。
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。
We should be on guard against the enemy's invasion.
我们要防范敌人的入侵。
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。
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。
The citizens were warned to be on guard against a sudden night attack.
市民们得到通知，要提防夜间的突然袭击。
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。
The police have questioned him thoroughly, and he'll be on his guard.
警察已仔细盘问了他，因此他会保持警惕。
Be on your guard against pickpockets.
提防扒手。
This fellow is very crafty; we had better be on our guard.
这个家伙诡计多端，我们可得小心点儿。
I want you to be on your guard and watch your step from now on.
我要你从现在起注意提高警惕，步步当心。
I want you to be on your guard and watch your step from now on.
我要你从现在起注意提高警惕，步步当心。
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