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acoustic filter

美音:[acousticfilter ]点这儿播放单词美音发声
英音:[acousticfilter ]点这儿播放单词英音发声
滤声器

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acoustic filter为短语/超纲词汇
1. When they managed to beg some from the local farmers, they had to filter it through linen to get rid of the filth it contained.
    当他们设法从当地的农民那里乞求到一些水时,他们不得不用亚麻布来过滤掉里面的污物。

2. I took this picture with a red filter.
    这张照片我是用红色滤光镜拍摄的.

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