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So, what do we have after our filter? Let us take a look
那么，过滤后我们会得到什么呢？
youdao
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The teacher gave each of us a piece of filter paper before doing the experiment.
做试验前，老师给我们每个人发了一张滤纸。
youdao
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The teacher gave each of us a piece of filter paper before doing the experiment.
做试验前，老师给我们每个人发了一张滤纸。
youdao