发射火箭口令英语

retrofire，点火发动机点火系统的故障诊断与排除Malfunction diagnosis of engine retrofire system and the trouble-shooting--------------launchLaunch a rocket; launch a torpedo.发射一枚火箭；发射一颗鱼雷

1.blast off2.对3.How often should I take this medicine?

1.send up 2.是的3.How much should I take this medicine? （若是问多少次才用often）

好像看戏都是如此说："3...2...1...lift off!" Lift off 在这不是动词,不分将来,现在或进行时.时常跟着说："We have a lift-off!" 就是说火箭成功离地,但这不表示发射成功,因为升空后还是可以以失败收场. 发射叫launch.火箭发射叫 launch rocket.形容成功发射叫successful launch.发射成功叫launchched successfully.当然,成功的话,就是过去式了.