单词 | rocket motor |
例句 | DEFINITIVE EXAMPLES 权威例句〔hunt〕To rotate up and down or back and forth without being deflected by the pilot. Used of a control surface or a rocket motor in gimbals.上下前后摆动:离开飞行员的偏转控制而上下或来回地转动。用于控制平台或火箭发动机的万向节美国传统〔springboard〕The 20th-century rocket experimenters springboarded from the heritage of the 19th-century rocket motor design.20世纪的火箭试制者们是踏着19世纪火箭发动机设计的跳板向前跃进的。英汉大词典 |
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