They also tested the fitness levels of the children by making them run on a treadmill.
科学家通过让孩子们在跑步机上跑步来测量它们的健康水平。
Astronauts do exercise for two hours every day. They run on a treadmill and use a special machine to exercise their arms.
宇航员每天要做两小时的运动,他们在跑步机上跑步,用特殊的机器来锻炼手臂。
Facebook also is trying out a treadmill station-where a worker can walk or run on a treadmill while tapping at a computer.
Facebook也正在试验一种跑步机工作台,员工可以在跑步机上一边走路或跑步,一边敲击计算机键盘。
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