These policemen wear helmets to protect themselves.
这些警察戴着头盔保护自己。
People refuse to wear helmets because they're thick and heavy.
人们拒绝戴头盔，因为它们又厚又重。
We use cameras on helmets too.
我们也使用头盔上的摄像头。
一些头盔看上去也很不错。
接下来，你需要头盔。
Do we have to wear the helmets?
一定要戴上头盔吗？
头盔是怎样保护你的？
Operators shall wear safety helmets.
操作人员应戴好安全帽。
I have a collection of all my helmets.
我收集了我所有的头盔。
Protective helmets must be worn on site.
在工地现场必须带防护帽。
Safety helmets must be worn on this site.
此工地必须戴安全帽。
These policemen wear helmets to protect them.
这些警察戴着头盔保护自己。
They grab helmets, body armor, and heavy firepower.
他们戴上头盔，披上护甲，拿上重火力武器。
The shop at the corner of the street sells helmets.
街道拐角那家商店出售安全帽。
Use seat belts and bike helmets to prevent injuries.
使用安全带及自行车头盔，以防止受伤。
Wearing helmets can help prevent severe head injuries.
戴安全帽有助于预防脑部的重伤。
In many parts of the world, bike helmets are not common.
在世界许多地方，自行车头盔不常见。
They put on their safety helmets before starting to work.
他们在工作开始以前戴上安全帽。
You must wear helmets when entering the construction site.
进入工地现场，必须佩带安全帽。
Motorcyclists must wear helmets to shield them from injury.
摩托车手必须戴头盔保护自己免受伤害。
Bike shop people are EXCELLENT at properly adjusting helmets.
自行车店里的人在调节头盔这方面是最棒的。
It is much safer for the children to wear safety helmets when biking.
在骑自行车时戴上安全帽对于孩子会更安全。
Imagine how cool it would be if someone really produced helmets like these.
想像一下若有人将这些头盔真的生产出来，那会有多酷。
New overalls and helmets were dished out before the party went underground.
这伙人到地下前，每人发一套新的工装裤和钢盔。
That's why polystyrene is ideal for use in bicycle helmets and other protective gear.
这也是为什么聚苯乙烯是制作自行车头盔以及其他保护装置的理想材料的原因。
Look! There are five people on that scooter, and none of them are wearing helmets!
瞧！一辆摩托车上载五个人，而且没有一个人戴安全帽。
Look! There are five people on that scooter, and none of them are wearing helmets!
瞧！一辆摩托车上载五个人，而且没有一个人戴安全帽。
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