(点击右边三个点，可调整速度，电脑上可下载)

filter

a filter is a device through which sound or light is passed and which blocks or reduces particular sound or light frequencies

filter是一种可以使声音或光通过的装置，同时可以阻挡或减少特定的声或光频;滤声器、滤光器、滤波器

You might use a yellow filter to improve the clarity of a hazy horizon.

你可以使用黄色滤光器让模糊的视野更加清晰。

Do you edit photos with filters or other photo editing tools?

你会用滤镜特效和其他修图工具修照片吗?