反应、制造或其他加工过程起始时使用的物质或原料。
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反应、制造或其他加工过程起始时使用的物质或原料。
The initial substance or raw material used at the beginning of a chemical reaction, manufacturing process, or other processing operation.
The purity of the starting material determines the quality of the final product.
起始物质的纯度决定最终产品的质量。
反应、制造或其他加工过程起始时使用的物质或原料。
The initial substance or raw material used at the beginning of a chemical reaction, manufacturing process, or other processing operation.
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Dictionary facts from AI_SUPPLEMENT.