... omponent ==> 初始强分量 initial substance ==> 起始物质 initial subtransient short-circuit current ==> 起始次暂态短路电流 ...
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为了保证最后产品的纯度，对起始物质应当建立一个适当的杂质限度。
Appropriate limits should be set in the specifications of the starting material, in order to ensure appropriate purity of the final substance.
氨是其它氮化合物(尤其是硝酸盐和亚硝酸盐)的起始物质，这些化合物主要用于农业肥料和炸药。
Industrially, ammonia is the starting material for most other nitrogen compounds (especially nitrates and nitrites), whose main USES are in agricultural fertilizers and explosives.
它可以代替剧毒的光气和硫酸二甲酯作为环境友好的有机合成中间体和起始物质，应用与羰基化和甲基化反应中。
It can be use as an environment-friendly intermediate and starting material for organic synthesis substituting the poisonous phosgene and dimethyl sulfate in carbonylation and methylation reaction.
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