So spacecraft test matrix consisting of development test, qualification test,acceptance test for unit,subsystem and system,as well as prelaunch validation and operational test can be called spacecraft environment reliability test matrix.是什么意思_So spacecraft test matrix consisting of development test, qualification test,acceptance test for unit,subsystem and system,as well as prelaunch validation and operational test can be called spacecraft environment reliability test matrix.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句