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。
2
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。
3
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.