Success in the quarrying industry comes from balancing efficiency with environmental responsibility.
采石業(yè)的成功來自于效率與環(huán)境責任的平衡。
The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.