Filter may serve the role to eliminate switching and EMI interfere in PWM signal. Thus to improve efficiency and fidelity, lower the filter cost and component sizes.

最终达到消除PWM信号中的开关信号和电磁干扰信号，提高效率和保真度，减小输出滤波器的体积和成本。

youdao

Lines in this file have four entries: a source and destination MIME type, a cost, and the name of the filter.

这个文件的行有四项：源mime类型和目标MIME类型、代价、过滤器的名称。

youdao

While it may seem that the access plan in Figure 5 is simpler, it comes with a higher estimated execution cost because no index could be exploited to filter out non-qualifying rows.

虽然看上去图5中的访问计划更简单，但是它的预计执行成本更高，因为不能利用索引过滤不符合要求的行。

youdao

Vacant rooms are released on the day, a day in advance or up to a week before travel to the app, which allows users to filter hotels by city, cost and quality.

ECONOMIST: Hotel-booking apps

Some algae cells are also easier to filter than others, reducing the energy and economic cost of "harvesting" the algae from cultures.

BBC: Bath's Roman Baths algae could fuel cars