blur [blɜ:(r)]

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n.模糊不清的事物；vt.使模糊，使看不清楚

something that you cannot see clearly

The houses appeared as a blur in the mist. 房子在薄雾中隐隐约约看不清。
If you move your eyes and your head, the picture will blur. 如果你的眼睛或头动了，图像就会变得模糊不清。