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

所以工头找了攀登者，用绳索从悬崖垂降下去，用轻型凿岩机及炸药碎石。

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是110，也是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的声音相当于是真空吸尘器噪音的八倍，也差不多是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。