Although Boeing made fuel cell flight trials last year, the aircraft took to the air with help from a battery-electric motor.
虽然波音公司去年进行了燃料电池动力机的试行，但飞机是在电瓶驱动的电动机的帮助下升空的。
Although Boeing made fuel cell flight trials last year, the aircraft took to the air with help from a battery-electric motor.
虽然波音公司去年进行了燃料电池动力机的试行，但飞机是在电瓶驱动的电动机的帮助下升空的。
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