目的：研究不同晶型倍他米松醋酸酯制备，分析其形成机理。
AIM: the purpose is to prepare different crystal forms of betamethasone acetate, and to analyse the mechanism of formation.
目的：研究不同晶型倍他米松醋酸酯制备，分析其形成机理。
AIM: the purpose is to prepare different crystal forms of betamethasone acetate, and to analyse the mechanism of formation.
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