与从混合物或原料中合成、纯化或分离化合物有关的
用于制备某物的
That serves to prepare something
初步的或预备的。
preliminary or preparatory
与从混合物或原料中合成、纯化或分离化合物有关的
Pertaining to the synthesis, purification, or isolation of compounds from mixtures or raw materials.
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