But be on guard for symptoms.

但要注意症状 。

African Union soldiers are on guard near the line.

非盟的士兵在队伍附近守卫。

George was on guard at the front gate last night.

乔治昨晚在大门口守卫。

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。

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。

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

33 你们要谨慎、儆醒祈祷、因为你们不晓得那日期几时来到。

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

跟动物一样，我们会保持警觉直至知道安全的时候才放松。

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。

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兵。

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

偏执？我不是偏执！我是谨慎！丹，你知道，我们必须永远保持警惕！