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in the front of æææ¯âå¨æä¸ç©ºé´å çåé¨âï¼å³ç²ç©å¨ä¹ç©çèå´ä¹å
eg.
I am standing in the front of the classroom æç«å¨æ室éé¢
I am standing in front of the classroom æç«å¨å¨æ室å¤
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