He pulled on a battered old crash helmet with a scratched visor.
他戴上了一顶破旧的、面罩上已有划痕的防护头盔。
We hope he knows what he's doing, but our advice is that everyone bring a crash helmet in case he misses a turn.
但愿他明白自己在干什么，我们还是先戴好安全头盔吧，天知道他什么时候撞车。
Apparel usual necessary personal protective equipment: work clothes, protective shoes, crash helmet, protective glasses, and earplug.
穿戴日常必需的劳保用品：工作服、安全鞋、安全头盔、防护眼镜和耳塞。
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。
It is recommended that you replace a helmet after four years use, as it becomes weathered and aged in that time, and cannot guarantee full protection in a crash.
头盔用上四年后，最好更换，因为这时头盔会损耗及老化，无法保证在意外时，能充分发挥保护作用。
Safety helmet use caused no attenuation of critical traffic sounds, no limitation of pre crash visual field, and no fatigue or loss of attention;
头盔不会造成对关键交通音响信号的听力衰减，不会造成撞前视觉限制，不会导致疲劳和记忆力不集中。
Safety helmet use caused no attenuation of critical traffic sounds, no limitation of pre crash visual field, and no fatigue or loss of attention;
头盔不会造成对关键交通音响信号的听力衰减，不会造成撞前视觉限制，不会导致疲劳和记忆力不集中。
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