1.
They did their best to keep on their guard.
他们尽量保持警惕。
2.
on guard against con artists; must remain on your guard in such a situation.
警惕反对派艺术家；在这种情况下必须保持警惕。
3.
A policeman has to keep on his toes all the time he's on duty.
警察在执勤时必须时刻保持警惕。
4.
Guaranteeing the safety of students requires continued vigilance on the part of teachers.
要确保学生安全，教师得时常保持警惕。
5.
You must stay wide-awake against possible dangers.
你必须保持警惕,防止可能的危险。
6.
But we must remain on the alert.
但是我们现在仍然要保持警惕。
7.
Constant vigilance is necessary in order to avoid accidents.
为了避免意外事故, 必须经常保持警惕。
8.
It is important that health organizations remain watchful.
卫生组织保持警惕是极为重要的。
9.
British authorities are telling citizens to stay vigilant and patient.
英国当局告知民众要保持警惕和耐心。
10.
Graham, meanwhile, warned US citizens to stay alert.
格雷厄姆同时警告美国公众要保持警惕。
11.
We remained on guard and the work of strengthening the dyke continued.
我们仍然保持警惕，加固堤坝的工作继续进行。
12.
" However, we are passing the information along for people to remain alert to the potential use.
不过，我们将告诫人们时刻对这些导弹保持警惕。”
13.
They stayed awake in their struggle against terrorists.
在与反恐怖分子的斗争中他们始终保持警惕。
14.
The garrison was alert, but too few.
驻防的军队是保持警惕的，但是人数毕竟太少了。
15.
Always stay alert and be aware of your surroundings.
随时随地保持警惕和是意识到你四周的环境。
16.
The key is to stay alert and yet relaxed. The mind is focused and alert while the body is relaxed and ready to pounce.
关键还是保持警惕但依然放松，精神专注而且警惕，而身体是放松的时刻准备爆发。
17.
We keep high vigilance.
我们保持高度警惕性。
18.
The act or process of keeping awake or mentally alert, especially for the purpose of guarding.
警惕保持清醒或精神上警惕之动作或过程，尤指为保卫的目的