1.
But some think Mr Bush would have been a better president with a hostile legislature to keep him on his toes.
但一些人认为，有敌意的立法机构将使布什保持机警，让他可以成为一位更好的总统。
2.
To remain alert or calm, especially in a crisis.
警觉保持头脑警觉或镇静，尤指在危机时刻
3.
Promotion prospects in the Force remained good at most levels.
大部分警务人员的晋升机会保持良好。
4.
We keep high vigilance.
我们保持高度警惕性。
5.
They did their best to keep on their guard.
他们尽量保持警惕。
6.
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。
7.
The police remained on their guard as the criminal was still at large.
"当罪犯仍逍遥法外时,警方保持警戒。 "
8.
We must keep our wits about us in order to survive this disaster.
为了在这场灾难中生存下去，我们必须随机应变（或：随时保持警觉）。
9.
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。
10.
Airport Security Unit [Hong Kong Police Force]
机场保安组〔香港警务处〕
11.
The old nurse was prudent and shrewd.
这位老保姆小心而机警。
12.
Stay sober but pretend to be drunk, and stay awake but pretend to be asleep.
保持清醒，但假装喝醉了；保持警觉，但假装睡着了。
13.
"Fire Escape, Keep Clear; Fire Escape, Asked to be Cleared Off OBstruction; Fire Escape to be Clear of OBstruction"
安全出口,保持通畅;火警疏散通道,请保持通畅
14.
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。
15.
To keep watch or guard, especially over a corpse.
看守，守灵保持警觉或警惕，尤指对一个尸体
16.
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。
17.
He keeps his eyes open and knows the situation clearly.
他总是保持警觉，对形势了如指掌。
18.
You must stay wide-awake against possible dangers.
你必须保持警惕,防止可能的危险。