A MERV rating tells you how well the filter can remove pollen and mold from the air as it passes through.

MERV 等级可以让你知道当花粉和霉菌在空气中传播时，过滤器将如何将之过滤。

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Corn pollen electric collector consists of transformer, electric circuit of rectifier and filter, electric motor, battery and pollen trap.

研制的玉米花粉电动采集器由变压器、整流滤波电路、轴流风机、蓄电池与采粉器组合而成。

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Effects of AC and anther density on pollen embryo and callus production and green plant regeneration were studied in a filter-sterilized, liquid-medium culture system.

在过滤灭菌的液体培养体系中研究了甘露醇预培养和诱导培养过程中活性碳和花药密度对大麦花培效率的影响。

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