Trainspotting:shoooting up heoroin or the like. Called so because a session will leave a dark linear mark (known as a "track") at the site of the affected vein. Harcore users will tend to have multiple sites of injection and will locate, or "spot" an opti
remind me of the terms in game theory: rationality, knowledge of rationality, knowledge of knowledge of rationality, knowledge of knowledge of knowledge of rationality, etc.
电影 
电视剧 
综艺 
动漫 
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