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对不起。我能跟你说几句话吗？ = Sorry. May I talk with you a while? Sphere triggers left and right wall's color; Cylinder changes top and bottom's color. 
1 Comment
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对不起。我能跟你说几句话吗？ = Sorry. May I talk with you a while? Sphere triggers left and right wall's color; Cylinder changes top and bottom's color.
1 Comment
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