“upper-stage”的概念、定义、翻译、参考文献-科学参考

单词	upper-stage
释义	upper-stage Encyclopedia 工学〔空间运输器分类〕释 upper-stage上面级在运载火箭上面增加的、相对独立的一级（或多级），由运载火箭发射进入准地球轨道或地球轨道，自主完成轨道机动、有效载荷分离与部署，将有效载荷送入预定工作轨道或预定空间位置的空间运输器。
随便看	ophthalmoscopic ophthalmoscopy ophthalmotonometer opiates Opificio delle Pietre Dure Opik-Oort cloud Opik theory opilia family opiment opinion opinion columnist opinion dynamics opinion leader opinion leaders opinion mining opinion of upper class opinion on site selection of construction project Opinions of the General Office of the State Council on Regulating the Layout and Adjustment of Rural Compulsory Education Schools Opinions of the Ministry of Education on the Implementation of Excellent Teacher Training Program Opinions of the State Council on Deepening the Reform of Examination and Enrollment System Opinions of the State Council on Further Improving Migrant Worker Services Opinions of the State Council on Promoting the Sustained and Healthy Development of Marine Fisheries Opinions of the State Council on Several Policies and Measures for Vigorously Advancing the Popular Entrepreneurship and Innovation Opinions of the State Council on Solving Problems of Migrant Workers Opinions of the State Council on Vigorous Development of E-Commerce to Accelerate Development of New Economic Driving Force

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。