With the development of aerospace techniques and the demand of military aerospace techniques, more and more country pays more attention to the Tracking, Telemetry and Command ( TT & C ) techniques of satellite. 随着我国在航天技术上不断进步和军事航天的需要,卫星测控技术越来越受到各国的关注。
The result of the comparison demonstrates that soft ball teaching results in more active attitude of study and attention of the students and brings better command of volleyball techniques. 比较研究表明,采用软式排球内容授课较之传统排球内容授课,学生表现出的学习态度更为积极,注意力水平更为集中,更利于学生掌握排球运动技术。