No littering
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1. No running, no chasing, no littering, no smoking and no eating. åºå
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2. Last but not the least, no littering is allowed. æåä¸æ¡ä¹å¾éè¦, 严ç¦ä¹±æåºç©.
3. No littering on the campus. å¨æ ¡åå
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