合成石英是一种化学物质，分子式是SiO2。
碳纳米管的合成是在石英管式炉中完成。
The synthesis of carbon nanotubes was conducted in a quartz tube furnace.
又如地质学家认为花岗石是由石英、肉色石、金星石合成的，也是对的。
So too the geologist does well to regard granite as a compound of quartz, felspar, and mica.
首先，石英砂和合成树脂在螺旋给料器中混合，再由螺旋给料器挤出落进兜砂布中。
In the program, sand and synthetic resin are mixed in the spiral feeder and extrude out to the cloth.
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