特定的反应中，我有氢气，固态铁，这些都已经是，处于室温和常压下，最稳定的元素单质。
Now in this particular reaction, I've got hydrogen gas, iron solid. Those already are elements in their most stable forms at room temperature and pressure.
铁单质是固态，这是他在室温和常压下，最稳定的状态，然后我们，可以算出生成热，现在这个。
Iron as an element is a solid. That's it's most stable state at room temperature and pressure, right, and so on. And then we can figure out heats of formation.
综述了生物医用铁系单质、合金、化合物、 磁性微球和免疫磁性微球的制备方法、性能和应用，并对其进行了评述。
The progress in preparation and application of iron metal or its alloy nano-materials , iron compound nano-materials and iron composite nano- materials are reviewed.
一直以来铁被认为是氧化h2s成为单质硫的有效催化剂。
Iron has long been known to be an effective catalyst for the oxidation of H2S to elemental sulfur.
磁控溅射离子镀铝膜不是简单的单质外接铝膜，而是铝和铁组成的合金膜。
The magnetron-sputtering ion plated aluminium film is not simply a circumscribed coating of a single element, but of an alloy consisting of both aluminium and iron.
磁控溅射离子镀铝膜不是简单的单质外接铝膜，而是铝和铁组成的合金膜。
The magnetron-sputtering ion plated aluminium film is not simply a circumscribed coating of a single element, but of an alloy consisting of both aluminium and iron.
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