The results indicated: freeze-drying method could do the longest preservation (at least 15 years) while beef broth agar plate method did the shortest (only 2 to 3 months).

结果表明：冷冻干燥法保藏菌种时间最长（本实验室已保存15年）；肉浸汤琼脂平板法保藏菌种时间最短（2～3月）。

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The results indicated: freeze-drying method could do the longest preservation (at least 15 years) while beef broth agar plate method did the shortest (only 2 to 3 months).

结果表明：冷冻干燥法保藏菌种时间最长（本实验室已保存15年）；肉浸汤琼脂平板法保藏菌种时间最短（2～3月）。

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