blast-off发射;升空
Fireworks Blast-Off放烟花
weapon blast-off武器发射
blast-off radar升空平台雷达
economic blast-off经济腾飞
blast t off发射
lift-off blast-off急速地升腾;飞翔
copper blast furnace off-gas铜冶炼烟气
the blast-off receives electric circuit发射接收电路
PHRASAL VERB（动词词组） When a space rocket blasts off, it leaves the ground at the start of its journey. (火箭等) 发射升空
Columbia is set to blast off at 1:20 a.m. Eastern Time tomorrow.
哥伦比亚号定于东部时间明晨1:20点火起飞。