如想加入我们的收费学习群，收看和下载每日口语视频、老师讲解及示范，请联系微信：Ryan9617 Wait till you see this. It's fantastic, unbelievable. See what? It's a Stephen Hawking lecture from MIT in1974. This isn't a good time. It's before he became a creepy computer voice. That's great, you guys have to go. Why? It's just not a good time. Lenard has a lady over. Yeah, right, your grandmother back in town?