1.Watch out for an attack by the enemy bombers and take extra precaution against anti-aircraft fire.
小心敌人轰炸机的攻击并额外警惕防空火力。
2.That's coastal areas of Hawaii and the western U. S. . Hawaii still chose to issue an emergency evacuation as an extra precaution .
这是夏威夷和美国西部地区的海岸线。夏威夷为防患于未然仍通知紧急疏散。
3.But be it extra precaution, style or a mental crutch, Obama has shown in the past that he needs the teleprompter .
就算他这是谨慎之举、个人风格或者心理安慰吧，奥巴马在过去一再表现出自己对于提词器的依赖。
4.Extra precaution is necessary at the time of attack!
攻击时进行额外警惕是必要的！
5.Then you might want to take extra precaution at keeping hackers from reaching into your cookie jar.
那你可要当心黑客把手伸进你的曲奇罐（cookiejar）。