It is advisable to wear a helmet while riding a bike.
骑车时最好戴。
Miners wore a helmet as a guard against falling rocks.
矿工戴钢, 防护落下岩石。
Protective helmets must be worn on site.
在工地必须戴防护帽。
Given the bumpiness of the road ahead, you might be better off with a crash helmet.
考虑到你面前这条颠簸道路，你最好还是配个吧。
Their helmets glanced in the sun.
他们在阳光下闪耀。
The battledress was covered with camouflaged coton drill Denison Smock; jump helmet was covered with a net or a grey beret was used.
战斗服是迷彩色：有网来防护，或者佩戴贝雷帽。
Hardcase's helmets has broken stripes along it, and though his unhelmeted face is not seen in the episode, he has similar tattoos as well.
“顽主”有断条纹，尽管本集中看不到他不戴脸，在他脸有相似文身。
President Zine El Abidine Ben Ali stands erect and unsmiling, sports a helmet of implausibly jet-black hair and wears a long dress-coat, studded with medals.
本•阿里总统腰杆笔直，不苟言笑，身着挂满勋章大衣，透过可以隐约看见他乌黑发。
He was a cuirassier, an officer, and even an officer of considerable rank;a large gold epaulette peeped from beneath the cuirass;this officer no longer possessed a helmet.
那是铁骑军一个军官，并且是一个等级颇高军官，一条很宽金肩章从铁甲里露出来，那军官已经丢了铁。
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