Bulgars, Serbs, Macedonians and Rumanians knew how to make cultures and how to preserve and multiply them.
保加利亚，塞尔维亚，马其顿以及罗马尼亚人都知道怎样进行人工培养细菌，怎样保护和繁殖它们。
Bulgars, Serbs, Macedonians and Rumanians knew how to make cultures and how to preserve and multiply them.
保加利亚，塞尔维亚，马其顿以及罗马尼亚人都知道怎样进行人工培养细菌，怎样保护和繁殖它们。
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