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rocket science▼◼◼◼[UK: ˈrɒkɪt ˈsaɪəns] [US: ˈrɑːkət ˈsaɪəns]
rocketry▼◼◼◼noun[UK: ˈrɒk.ɪ.tri] [US: ˈrɑːk.ə.tri]
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