5视频豆瓣8.6
10视频豆瓣9.1
9视频豆瓣5.9
6视频
9视频豆瓣6.7
8视频豆瓣8.3
穿着长袍的年轻理科女生在白板上写公式,转身直接对着镜头微笑。
Young female science student in a robe writing formulas on a whiteboard, while turning around and smiling directly at the camera.
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