three-stage launcher三级: three-level; Fully Good运载火箭: carrier rocket; carrier boos ...第三级运载火箭: third stage launcher单级运载火箭: single-stage booster两级运载火箭: two-stage launcher下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:三级运载火箭，即可在微信中查询翻译
