【TED】Dave Troy：揭示城市交會點與隔閡的社群地圖！ (【TED】Dave Troy: Social maps that reveal a city's intersections — and separations (Dave Troy: Social maps that reveal a city's intersections — and separations))┃VoiceTube 看影片學英語
【TED】Dave Troy：揭示城市交會點與隔閡的社群地圖！ (【TED】Dave Troy: Social maps that reveal a city's intersections — and separations (Dave Troy: Social maps that reveal a city's intersections — and separations))
