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来源:雅诚德英语网
This provides the added advantage of not having to build an ignition system into the rocket.
这一过程有一个另外的好处,就是不必为火箭发动机建造一个点火系统。
This provides the added advantage of not having to build an ignition system into the rocket.
这一过程有一个另外的好处,就是不必为火箭发动机建造一个点火系统。