Inventor Dean Kamen displayed his Human Transporter, a two-wheeled, motorized scooter that costs less than US10 cents a day to run.
发明人迪安·卡门展示了他的人体运输车—双轮电动踏板车，其每日运转的费用不到10美分。
Inventor Dean Kamen displayed his Human Transporter, a two-wheeled, motorized scooter that costs less than US10 cents a day to run.
发明人迪安·卡门展示了他的人体运输车—双轮电动踏板车，其每日运转的费用不到10美分。
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