The animals can weigh up to 20 pounds so the Miami National Weather Service told people to be on guard against raining reptiles.

这些动物可能重达 20 磅，因此，迈阿密国家气象局要求人提防可能落下来的爬行动物。

Officials are telling people with respiratory problems to be on guard against that, and they say La Soufriere could continue exploding for days or possibly weeks before it quiets back down again.

官员告诉患有呼吸系统疾病的人要对此保持警惕，他表示，La Soufriere火山可能会持续喷发几天甚至几周，然后才会恢复平静。

When you are on guard you must be careful and alert about something – it could be accuracy of what you see or hear, or just being aware of the dangers around you.

当你保持警惕的时候，你必须小心和警觉某事——它可能准确反映你看到或听到的东西，或者意识到你周围的危险。

33 Be on guard! Be alert! You do not know when that time will come.

33 你要谨慎、儆醒祈祷、因为你不晓得那日期几时来到。

George was on guard at the front gate last night.

乔治昨晚在大门口守卫。

Like other animals, we are on guard until we know it is safe to relax.

跟动物一样，会保持警觉直至知道安全的时候才放松。

And today, NATO countries are on guard against moves by Russia.

今天，北约国家对俄罗斯的行动保持警惕。

So, penguin parents must always be on guard.

因此，企鹅父母必须时刻保持警惕。

Major ports on India's east coast are on guard against an incoming storm.

印度东海岸的主要港口对即将到来的风暴保持警惕。

The stoats, with their guns, are on guard all round the walls, and they're very good guards too. We can't attack the place from outside. They're too strong for us. '

持枪的大白鼬把守在围墙周围，他还都是很不赖的卫。是不能从外面攻打进去的。对于来说，他太厉害了。

Ruburt in the past has been very sensitive as far as your work is concerned, and this year has seen some improvement.There is some need to be on guard but hardly any to be up in arms.

过去的鲁伯对于你的工作非常敏感，今有了一些进步。需要保持一些警惕，但 几乎没有需要大动干戈的地方。

With the Lunar New Year set to begin on January 25, the WHO called on Thai officials and the public to be on guard against the virus.

随着农历新将于125日开始，世卫组织呼吁泰国官员以及公众警惕这种病毒。

So, if you ever find yourself foraging, remember to be on guard, and when in doubt, it's always best to toss it out.

倘若发现自己觅食蘑菇，要记得保持警惕，有一丝疑问就扔掉吧。

But both the Fed and the White House say they are on guard for any change in expectations that might threaten that.

但美联储和白宫都表示，他对可能威胁到这一点的预期变化保持警惕。

So the U.S. government warned Americans to be on guard concerning the stories they read on e-mail and social media.

所以美国政府警示美国人民，要警惕在电子邮件和社交媒体上看到的信息。

Cybersecurity specialists are also expected to be on guard against the hacking of computerized election systems in some states, including Colorado.

预计网络安全专家也将保持警惕，防范科罗拉多等州的计算机选举系统遭到黑客攻击。

Be on guard for symptoms such as chest congestion, extreme cough or pain in the stomach.

如果出现胸闷、严重咳嗽或胃部疼痛等症状，那就需要警惕了。

Paranoid? I'm not paranoid! I'm cautious! You see Dan, we have to be on guard at all time!

偏执？不是偏执！是谨慎！丹，你知道，必须永远保持警惕！

A soldier was on guard in front of the house in which the general was living.

将军的住所前有一个站岗士。

But be on guard for symptoms.

但要注意症状 。