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。

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。

Always on guard against shadowing submarines.

时刻警惕跟踪的潜艇。

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。

Be on guard against those who are jealous of your success.

要提防那些嫉妒你的成功的人。

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。

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。

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。

They just are on guard against each other, let alone hope they can share with each other.

他们只是相互提防，更不用说希望他们能互相分享。

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。

The coastal regions should be on guard against possible disasters that may be brought about by the typhoon.

沿海地区应注意预防台风可能带来的灾害。

Especially are we urged to be on guard against those infatuating attempts to breach the barricades of the mind.

我们特别被敦促要警醒提防，绝不允许那些令人混乱之尝试使心中的壁垒有了破口。

Cech's immediate reaction was to feel sorry for Helton, as well as putting himself on guard against anything similar.

切赫当时立刻的反应是替赫尔顿遗憾，作为门将他自己也会面对类似的情况。

To be more precise, they were the manifestation of a positive attitude, and together we were on guard against the virus.

他说：“他们就像我的分身一样，准确地说，是积极态度的化身，和我一起警惕着可能出现的病毒。