So foremen brought in high scalers who descended the cliffs on ropes, removing rubble with jackhammers and dynamite.

所以工头找来了攀登者，绳索从悬崖垂降下去，凿岩机及炸药来清除碎石。

Twice as loud as that though at 110 decibels is the average threshold that humans begin to experience pain at.

凿岩机噪音的两倍则110分贝，也人体开始感觉到疼痛的临界点。

100 decibels would be eight times louder than a vacuum cleaner and is roughly the noise produced by operating a jackhammer.

100分贝的声音相当于吸尘器噪音的八倍，也差不多一台手持式凿岩机工作时发出的噪音。

The workers, most of whom are rock drill operators, had gathered at a football pitch near Marikana mine, cheered when they were informed of the 22% offer.

些工人多为凿岩机操作员，他们聚集在Marikana矿附近一处足球场，欢呼称加薪22%了。