| 1. | There are four principal types of limestones .
石灰岩有四种主要类型。 |
| 2. | The limestone must be calcined in such a way .
石灰石必须煅烧到这样地步。 |
| 3. | Limestone deposits are prevalent .
石灰石的蕴藏到处都有。 |
| 4. | Limestone is rock composed of calcium carbonate .
石灰石是由碳酸钙所构成的岩石。 |
| 5. | Cement is made from limestone .
水泥是由石灰石造成的。 |
| 6. | Limestone had been carved away .
石灰石已被开采运走。 |
| 7. | The mud is interrupted by numerous thin beds of limestone .
泥质物被许多薄层灰岩所隔开。 |
| 8. | Economically minable limestone does not occur so frequently .
经济上值得开采的石灰石并不这样多。 |
| 9. | The answer is the same if the limestone overlays the sandstone .
当灰岩盖在砂岩上时，系数是相同的。 |
| 10. | There the soil is from weathered limestone soil or loess .
那里的土壤是经过风化作用的石灰石土壤或黄土。 |
