所有骑摩托车的人都必须戴头盔，这是强制性的。

It is compulsory for all motorcyclists to wear helmets.

《牛津词典》

骑自行车的人不戴头盔应该被罚款。

The cyclists should be fined for not wearing helmets.

youdao

如今宁波所有骑电动自行车的人都必须戴头盔。

Now all the e-bike riders in Ningbo must wear helmets while riding.

youdao

It's very hard to see very much and you can't anywhere pretty much but straight ahead.

戴上头盔后视野很有限,基本上哪儿都看不到,只能往前看

耶鲁公开课 - 古希腊历史简介课程节选

The top is this helmet that comes up over his face and covers it pretty totally.

头部戴有头盔,覆盖面部,能完全遮住脸

耶鲁公开课 - 古希腊历史简介课程节选

So there's this guy with this helmet, it must weigh--I'm trying to think.

那么士兵戴着这个头盔,应该是很沉的,我想想

耶鲁公开课 - 古希腊历史简介课程节选