zero-length launch booster零: zero zero sign; nought长度: length; longitude; size; ext ...发射: launch; radiate; project; di ...助推器: booster; auxiliary booster; ...发射助推器: launching boost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:零长度发射助推器，即可在微信中查询翻译
