Tin is an elementary substance.
锡是一种元素物质。
Secondly, the enthalpy of elementary substance under standard state is defined as the criterion of component enthalpy, thus reaction heat is no longer needed in energy balance.
其次，热量衡算时，将标准状态下单质的焓定义为所有组分的基准焓，不再需要反应热数据。
The skills are the most elementary and important instrument which re-create the charm of vocal music which existed in the form of substance.
声乐技能是使物质形态和观念上的声乐艺术作品得以再创造、再现其艺术魅力的最基本、最重要的手段。
Finally we drew an elementary conclusion that the fairly strong poisonous components in the two plants were mainly non - polar or weak-polar substance.
初步判定这两种植物中毒力较强的活性成分主要是一些非极性或极性较弱的物质。
Finally we drew an elementary conclusion that the fairly strong poisonous components in the two plants were mainly non - polar or weak-polar substance.
初步判定这两种植物中毒力较强的活性成分主要是一些非极性或极性较弱的物质。
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