I have already explained that through repetition a dog begins to look at a marker as a secondary reward.
我已经解释过，经过重复，狗儿开始把标记当作次要的奖励。
The 3rd "Chinese Bridge" Chinese Proficiency Competition for Foreign Secondary School Students and reward ceremony were closed in the Great Hall of the People of Chongqing on the evening of Oct. 28.
10月28日晚，第三届“汉语桥”世界中学生中文比赛闭幕式暨颁奖晚会在重庆市人民大礼堂举行。
The 3rd "Chinese Bridge" Chinese Proficiency Competition for Foreign Secondary School Students and reward ceremony were closed in the Great Hall of the People of Chongqing on the evening of Oct. 28.
10月28日晚，第三届“汉语桥”世界中学生中文比赛闭幕式暨颁奖晚会在重庆市人民大礼堂举行。
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