The best-known extracts are derived from specially selected strains of primary grown baker's yeast.

最知名的酵母抽提物来自于专门选择的面包酵母菌。

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The minimal inhibitory concentration (MIC) of 7 antibiotics to 6 selected strains and standard strain, tested with cuvette double dilution method, showed that level of resistance was high.

从中选择6株不同耐药水平的多重耐药大肠杆菌，采用平皿二倍稀释法对其进行最低抑菌浓度测定，结果表明多重耐药的水平相当严重。

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These selected and superior strains of living protoplasm should be jealously and intelligently guarded when once they make their appearance.

这些挑选出来的和更高活性生命原生质链条一旦它们出现时候将被留心和聪明的被保护着。

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