| 1. | The material for the threads is spider web or quartz fibers .
丝的材料可以用蛛丝或石英丝。 |
| 2. | A crystal is cut from quartz .
晶体取自石英。 |
| 3. | Well-sorted quartz sandstones are generally not very abundant .
分选良好的石英沙岩一般并不十分丰富。 |
| 4. | It looks like quartz crystals sticking up out of the dark hollow .
它象石英晶体，在黑色的空间耸立着。 |
| 5. | Fluviatile sands deposited by delta distributaries are quartzose .
三角洲分流中沉积的河流砂是石英质的。 |
| 6. | A glass or quartz tube has tungsten electrodes sealed in each end .
两根钨丝电极是封在玻璃管或石英管的两端。 |
| 7. | The radiation was filtered either by borosilicate glass or by quartz .
辐射光源或用硼硅酸盐玻璃或用石英过滤。 |
| 8. | At flat the host is quartz diorite with a finegrained contact phase .
在富来梯，主岩为细粒接触相的石英闪长岩。 |
| 9. | Today, quartz crystal clocks are generally used on the seismograph stations .
目前，地震台站一般采用石英晶体钟。 |
| 10. | To this class of substance belong mica , porcelain , quartz , glass , wood , etc .
属于这类物质的有云母、瓷器、石英、玻璃、木材等等。 |
