| 1. | Sand and gravel may form bars within the channel .
沙和砾石可以在沟槽内形成沙洲。 |
| 2. | Gravel is much used for road-making .
砾石常用来筑路。 |
| 3. | Gravel banks along rivers are always light or white .
河流的砾石滩始终为浅色或白色。 |
| 4. | They may form concentrated pockets in gravels .
它们可能在砾石堆积物中形成富集的矿囊。 |
| 5. | More gravel is needed to fill the hollow in the drive .
需要更多的砾石来填平车道上的坑洼。 |
| 6. | In the extreme case the boxwork collapses, forming a breccia .
在特殊情况下，蜂窝坍塌，形成角砾石。 |
| 7. | The host rock conformably overlies a band of siliceous chertybrecia .
含矿主岩整合地上覆于硅质燧石角砾石带之上。 |
| 8. | The host rock conformably overlies a band of siliceous cherty breccia .
含矿主岩整合地上覆于硅质燧石角砾石带之上。 |
| 9. | Sandstone and conglomerate are the consolidated equivalent of sand and gravel .
砂岩和砾岩分别是砂和砾石固结的产物。 |
| 10. | The boat continued to advance, until its bows grated on the gravel of the beach .
小舟继续前进，船头终于触到了砾石滩。 |
