作者共發了6篇帖子。
Dog-tired means very tired
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This word is very interesting
 
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Now I am dog-tired
 圆环之理：回复 @啊啊是谁都对：Me, too. I am also happy to meet a new friend!
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I am a little curious about its origin
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Now I am too tired to explore its origin, but in the future (perhaps morning) I will research about it
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