首先，区分汽车和飞机的指标是速度，至于磁悬浮车辆，那只能在摩登家族和电影中出现。

First of all, it is important to distinguish convertible car-planes from the speedy, levitating vehicles seen on the Jetsons and in the movies.

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交通：它们都是使用燃料电池的汽车，飞机（使用从核植物中提取氢气）和磁悬浮列车。

TRANSPORTATION: It’s all fuel-cell cars and planes (using hydrogen from the nuclear plants) and maglev trains.

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