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1·And yet pure iron is scarcer than gold or diamonds.

然而纯铁比黄金或金刚石还罕见。

2·Pure iron is not used in industry because it is too soft.

纯铁太软，所以不用在工业上。

3·Pure iron is not used in industry because is too soft.

纯铁太软，所以不用在工业上。

4·Pure iron is not used in industry while it is too soft.

纯铁很软，所以不用于工业。

5·The nitrided layer of pure iron consists of compound layer and diffusion layer.

纯铁渗氮层则由化合物层和扩散层组成。

6·Huamao Changs pure iron specifications, the whole variety, quality distinctions.

华茂昌公司的纯铁规格多、品种全、质量优。

7·So the correct carbon steel forging temperature range does not include industrial pure iron.

碳钢正确的锻造温度范围应不包括工业纯铁。

8·The mechanism of hydrogenation of nitrogen into ammonia was discussed on the pure iron surface.

讨论了在纯铁催化剂上，氮分子和氢分子逐步合成氨的反应机理。

9·The qualified industrial pure iron whose carbon content is below 0.025% has been made in laboratory.

在实验室中制备出含碳量低于0.025％合格的工业纯铁。

10·In this paper, the effect of additive boron on the diamond synthesized using pure iron powder catalyst was studied.

本文研究了添加剂硼对纯铁粉末触媒合成金刚石的影响。