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| collision risk (航天器在轨道运行时受到空间碎片撞击的风险); collisional risk (航天器在一定时间内受到空间碎片碰撞的危险性) | |||
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碰 撞 风险 : 2 phrases in 2 subjects |
| Aviation | 1 |
| Business | 1 |
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