13. 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。
youdao
14. The characteristics and main concerns in design are described of Chinese first high temperature pipe evaporator in sulfuric acid production by pyrites.
介绍国内第一台硫铁矿制酸高温热管蒸发器的性能特点和设计的主要思路。
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15. Gold-bearing minerals are separated in the laboratory and the chemical analysis of each individual indicates that the gold grade for fine pyrites is 3.
对矿区各种载金矿物经实验室分离并进行化学分析显示：细粒黄铁矿中金元素含量是粗粒黄铁矿的3。
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16. Core HD196A, recovered from the seafloor of the northeastern South China sea, has large amount of pyrites. The morphologies of pyrites are as the form of rod with hollow or not.
南海东北部的HD196 A岩心中发现大量条状的自生黄铁矿，以中空或实心为主。
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17. The work has researched in adsorption and desorption of iodine and technetium on brass ore, lead glance, rare-earth hematite, antimony glance, molybdenite and iron pyrites and so on.
本工作研究了黄铜矿，方铅矿、稀土赤铁矿，辉锑矿，辉钼矿，黄铁矿等六种矿物对碘和锝的吸附和解吸。
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18. There were two pieces of quartz in that box, both of them carefully polished. They had been chipped into driftwood shapes. There were little sparkles of iron pyrites in them like flecks of gold.
盒子里是两块石英，两块都经过仔细琢磨，削成浮木的形状，石英中的硫化铁发出闪闪金光。
youdao
19. There were two pieces of quartz in that box, both of them carefully polished. They had been chipped into driftwood shapes. There were little sparkles of iron pyrites in them like flecks of gold.
