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Todd: Hello, Gabrielle! Gabrielle: Hello! Todd: How are you doing today? Gabrielle: Good thanks. Todd: Now, Grabrielle, I hear that you are going back home to New Zealand Gabrielle: That's right. I'm going home for summer. Todd: OK. What are your pla
Speed and capacity 速度与生产能力 A:OK, so this is our newest machine. It was only installed last year. A:好,这是我们最新的设备。去年刚安装的。 B: What's the running speed of the machine? B:这个机器的运行速度是什么
Likewise, light travels at its maximum speed through a vacuum-the interstellar highway-but it slows down when it enters air, water, or some other medium. Through air, light moves a hint slower: forty miles-per-second less than its maximum speed. Thro
Being Young: A State of Mind 保持年轻:一种精神状态 I recently went on a family outing. 我最近参加了一次家庭郊游。 The kids were running around, 孩子们到处乱跑, being crazy like kids do, 就像孩子们那样疯狂,
世界上跑得最快的是什么?答案是光速。它每秒能跑186,280英里。因为即使在太空中,光速也大致相同,所以光年也就用于描述不同星球之间的距离。记住了哦,光年是距离单位,不是时间单位
Todd: Hello, Gabrielle! Gabrielle: Hello! Todd: How are you doing today? Gabrielle: Good thanks. Todd: Now, Grabrielle, I hear that you are going back home to New Zealand Gabrielle: That's right. I'm going home for summer. Todd: OK. What are your pla