Not everyone is able to filter out that negative element.

不是所有人都能过滤掉那些负面元素。

youdao

Who knows when you might want to clean your filter or front element that has become moist from going in and out of cold temperatures?

你不知道什么时候可能要清理滤镜或者镜头盖之类，因为在寒冷的环境中，镜头很容易变得潮湿。

youdao

That needs power, as well as frequent changes of the filter element as the pores fill up with bugs.

这个过程需要动力，也需要经常的更换滤芯，否则这些微孔就会被杂质堵塞。

youdao

Philips' solution is to combine two blue and one red element, but use a green phosphor filter to convert one of the blue LEDs to green.

ENGADGET