The geologist does well to regard granite as a compound of quartz, felspar, and mica.

地质学家认为花岗岩是石英，长石和云母的混合物非常好。

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In Arctic North America, the Eskimos produced a slow-burning spark by striking quartz against iron pyrites, a compound that contains sulphur.

在北美北极圈地区，爱斯基摩人生产火星通过黄铁矿和石英对撞，产生一种化合物包含硫磺。

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So too the geologist does well to regard granite as a compound of quartz, felspar, and mica.

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。

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