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X-51A

X-51A

X-51A

X-51A

1

Another hypersonic craft, the X-51A WaveRider developed by Boeing , has fared little better .

另一架超音速飞机，波音研发的踏浪者 X-51A ，进展略优。

2

The X-51A burned for more than 200 seconds and accelerated the craft to five times the speed of sound .

X-51A 起动超过 200 秒，促使飞行器速度提高到音速的五倍。

3

More X-51A flights are expected as early as this fall .

更多的 X-51A 的航班，预计最早在今年秋天。

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