If this coloration is absent, loosen the screw caps and place the tubes in a boiling water bath for 10 minutes to drive off the dissolved O2 from the medium.
如果这种颜色变化并不存在，松开管子上的螺旋盖子，同时放在沸水浴中十分钟去驱赶溶在培养基中的氧气。
If this coloration is absent, loosen the screw caps and place the tubes in a boiling water bath for 10 minutes to drive off the dissolved O2 from the medium.
如果这种颜色变化并不存在，松开管子上的螺旋盖子，同时放在沸水浴中十分钟去驱赶溶在培养基中的氧气。
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