北方城市廊坊室内空气细菌总数夏季高于冬季，室内空气真菌总数冬夏差异较小。
Bacteria count was higher in summer than in winter in north, while fungal count was almost the same.
集中空调关闭期间，采集集中空调通风系统送风管内的积尘样品，检测其细菌总数、真菌总数；
Dust sample in blast pipe was collected when centralized air ventilation system was off, the total content of the bacterium and fungus was examined.
以真菌为例，其已知数量约为10万种，但生物学家估计，自然界中真菌的总数量至少为150万种。
Consider, for example, the fungi, with approximately 100, 000 known species but by expert estimate at least 1.5 million species present in nature.
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