The breed and the degree of contaminative microbes were different because of different areas, different seasons and different planting patterns.
杂菌污染的种类及程度因地域、季节、栽培模式等的不同而有所不同。
参考来源 - 食用菌周年化生产中污染调查及综合防治研究·2,447,543篇论文数据，部分数据来源于NoteExpress
文章最后对老陈醋浑浊沉淀原因进行了探讨，原料分解不彻底和杂菌污染等是造成老陈醋浑浊沉淀的主要原因。
On the microscope, the sedimentation in superior mature vinegar was presented that the lower degradation of material and bacterial contamination were the main reason.
一张配方都对抗其因化学降解而导致的变质。以及防止它受到杂菌污染及过度的热量，光能，湿气导致的破坏性影响。
The formulation must be preserved against decomposition due to chemical degradation and protected from microbial contamination and the destructive influences of excessive heat, light, and moisture.
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