| 单词 | blast off | 
| 释义 | blast off 1. phrasal verb When a space rocket  blasts off, it leaves the ground at the start of its journey.  2.   See also  blast-offSee full dictionary entry for  blast blast-off uncountable noun Blast-off is the moment when a rocket leaves the ground and rises into the air to begin a journey into space.   The original planned launch was called off four minutes before blast-off.   | 
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