请戴上头盔。

Please get yourself a helmet.

youdao

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.

youdao

在滑雪或者雪上摩托时要戴上头盔。

Wear a helmet while skiing, snowboarding and snowmobiling.

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

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