A man in a crash helmet was mounting a motorbike.一位戴头盔的男子正跨上摩托车。He pulled on a battered old crash helmet with a scratched visor.他戴上了一顶破旧的防护头盔，上面的面罩已有划痕。Miners wore a helmet as a guard against falling rocks.矿工头戴钢盔,防护落下的岩石...
...rapping the glass with the knuckles of his right hand...用他右手指关节敲击玻璃Hilton roused him at eight-thirty by rapping on the door...希尔顿8点半敲门把他叫醒了。She kept rapping out orders: "Up a bit, down a bit, do it like that."她不断大声地发号...