| 释义 |
DEFINITIVE EXAMPLES 权威例句〔basalt〕A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.玄武岩:一种硬的、致密的、黑色的火山岩。它主要由斜长石、辉石和橄榄石组成,外表经常很光滑美国传统〔porphyry〕Rock containing relatively large conspicuous crystals, especially feldspar, in a fine-grained igneous matrix.斑岩:含有嵌入致密的合成基质的相对较明显的长石晶体的岩石美国传统〔stishovite〕A dense tetragonal polymorph of quartz that is formed under great pressure and is often associated with meteoroid impact.超石英:一种致密的四方形石英矿物,常在高压下生成,并与流星撞击有关美国传统 |