每小时半哩而已。所以还要一段时间后才有晚餐！
Half a mile an hour! Dinner won't be coming for quite a while!
第一分钟左右的平均上升速度约为每小时260哩。
The average rate of rise during the first minute or so is approximately 260 miles per hour.
我们以每小时一哩的速度行进。
你知道这课的时速限制是每小时五十五哩。
莱茵河不断以每小时六、七哩的速度，滔滔滚流，波涛起伏。
The Rhine flowed on, swirling and eddying, at six or seven miles an hour.
鸸的跑速每小时可达30哩(50公里)，被困时用三趾的大脚踢人。
Emus can run up to 30 MPH (50 KPH); if cornered, they kick with their large feet.
为了有一个更让人放松的速度，每小时十哩以内的风级中可以进行游弋或微风风帆冲浪。
For a more relaxing speed, cruising or light-wind windsurfing takes place in winds of approximately 10 knots and under.
为了有一个更让人放松的速度，每小时十哩以内的风级中可以进行游弋或微风风帆冲浪。
For a more relaxing speed, cruising or light-wind windsurfing takes place in winds of approximately 10 knots and under.
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