研究人员表示气球和化学物质的重量将相当于数辆双层汽车，运送它们需要非常大的卡车。
Researchers said the weight of the balloon and chemicals would match several double decker buses, requiring a very large vessel.
在当时，小汽车的牌照和大卡车的牌照一样，都是根据车辆的重量来收费的。
At the time, car tags, like truck licenses, were priced according to vehicle weight.
在当时，小汽车的牌照和大卡车的牌照一样，都是根据车辆的重量来收费的。
At the time, car tags, like truck licenses, were priced according to vehicle weight.
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