the occurence of gold 金的赋存状态
occurence of the seedlings 幼苗发生
frequency of occurence of states 状态序偶出现频率
occurence of malformed tomato fruit 番茄畸形果
mode of occurence 埋藏条件
law of occurence 发生规律
base of regularity of occurence 以成本发生之经常与否为基础
The occurence of gold ore is controlled by structure.
金矿床（点）的产出受构造控制。
The FT-IR spectra of the product confirmed the occurence of grafting.
通过FT-IR对接枝产物进行了表征，证实了接枝反应的发生。
Objective:To understand the occurence of adverse drug reactions(ADR) caused by amino acid injection.
目的：了解氨基酸注射液引起药物不良反应的发生情况。
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