The cost of excavating a cubic yard or meter of rock is many...
[translate] aBut to deceive onesel 但欺骗onesel [translate] aThe cost of excavating a cubic yard or meter of rock is many times greater than the cost of excavating the same volume of soil 挖掘岩石立方码或米的费用是许多次大于挖掘土壤的同一容量的费用 [translate] ...