Media Query Listeners——可以运行脚本以响应媒体查询的变化(比如说根据窗口尺寸在高低清晰度的图片间进行切换)。
Media query Listeners - enables running a script in response to a change in the media query (for eg switching between low and high res image sources depending on window size).
线性失真-频率响应，指向性响应，共振，主要影响音色和清晰度。
Linear distortion - frequency response, polar response, resonance - affects primarily the timbre and clarity of a loudspeaker.
在快速辐射扫描成像系统中，阵列气体电离室时间响应速度的快慢将直接影响图像的清晰度。
In quick scanning radiography system, the time respond speed of array gas ionization chamber effects the image clarity directly.
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