请戴上头盔。
骑自行车的人都必须在自行车道行驶，并且要戴上头盔。
The cyclists should all have to be made to use the cycle lanes and wear helmets.
在滑雪或者雪上摩托时要戴上头盔。
不要忘记戴上头盔、护腕和护膝。
Don't forget your helmet, wrist guards, and knee and elbow pads.
在自行车比赛的过程中，必须戴上头盔。
这是一个车手最喜欢的事情：戴上头盔，为胜利而战。
This is what a driver loves most: putting on the helmet and fighting for the win.
之后是春天的三周训练，戴上头盔和护肩长跑，但没有比赛。
Then they have three weeks of spring practice, running around in helmets and shoulder pads, but no games.
现在的我们为电视广告所干扰，在孩子开始学着走路的时候就给他戴上头盔。
We are now plagued with ads for helmets for our children to wear when they learn to walk!
你得身着特制的服装，戴上头盔，穿上救生衣，以防橡皮筏倾翻或者沉入水中。
You have to wear special clothing, a helmet and a life jacket, just in case your raft gets turned upside down or sinks.
你得身着防水的服装，戴上头盔，穿上救生衣，以防橡皮筏倾翻或者沉入水中。
You have to wear waterproof clothing, a helmet and a life jacket, just in case your raft gets turned upside down.
伞兵不必再冒着生命危险练习跳伞，戴上头盔在鼓风机室里面就可以学习各种技巧；
Paratroopers don't have to risk their lives to practice parachuting, wear a helmet on the blower room can learn various skills;
每天早晨，我的徒步旅行包括下三阶楼梯，然后提着我的竹制自行车进入到城市的街道，戴上头盔和护具。
Each morning, my trek includes a walk down three flights of stairs, where I grab my handmade bamboo bicycle and enter the city streets with my helmet fastened and secured.
其实，从政策层面对预防交通事故是很简单的，而且颇见成效，比如限速、规定骑乘两轮车的人员必须戴上头盔、改善道路设计以及增加驾驶考试次数等等。
Yet the policy prescriptions are simple and proven: enforced speed limits, helmet laws for those on two wheels, good road design and more driving tests.
周二，在数千人注视下，发明家16岁的儿子戴上头盔，紧绑喷汽式背包，随着摩托似的引擎声响，马丁背包飞离地面三尺左右，巨大的引擎声让很多小孩都捂住耳朵。
As thousands looked on Tuesday, the inventor's 16-year-old son donned a helmet, fastened himself to a prototype Martin jet pack and revved the engine, which sounded like a motorcycle.
要读一读保险单上那小小的字体写的究竟是什么。这正是我想象女儿去旅行时最令人毛骨悚然的情景，尽管她向我保证会全身穿上皮装，戴上头盔，速度也不会超过每小时25英里。
This is exactly the kind of hair-raising scenario I imagined when my daughter went travelling - although she assured me she wore full leathers, a crash helmet and never went above 25mph.
要读一读保险单上那小小的字体写的究竟是什么。这正是我想象女儿去旅行时最令人毛骨悚然的情景，尽管她向我保证会全身穿上皮装，戴上头盔，速度也不会超过每小时25英里。
This is exactly the kind of hair-raising scenario I imagined when my daughter went travelling - although she assured me she wore full leathers, a crash helmet and never went above 25mph.
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