blast-off

noun
🔊/ˈblɑːst ɒf/
🔊/ˈblæst ɔːf/
[uncountable]
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  1. the moment when a spacecraft leaves the ground(宇宙飞船的)发射,升空
    • Blast-off is in 30 seconds.30秒钟后发射升空。
    Topics Spacec2