| 单词 | quartz crystal |
| 释义 | quartz crystal (once / 76749 pages) n WORD FAMILY quartz crystal: quartz crystals USAGE EXAMPLESThey also dated quartz crystals from the floor of the rock shelter and found that its lowest layers were from about 44,000 years ago. Washington Post(Nov 08, 2016) They point to the capacity for quartz crystals, used in watches, to generate an electric charge. Los Angeles Times(Jul 16, 2016) Murphy's current design utilizes a pair of drilled quartz crystals lit with a fiber optic system. The Verge(Apr 10, 2016) n a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators Hyper quartz a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities |
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