Is the biofuel partly powering this Boeing 747, the future of aviation, or an environmentally damaging publicity stunt?
部分驱动这架波音747的生物燃料是航空业的未来还是一次危害环境的公关特技？
Is the biofuel partly powering this Boeing 747, the future of aviation, or an environmentally damaging publicity stunt?
部分驱动这架波音747的生物燃料是航空业的未来还是一次危害环境的公关特技？
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