storable propellant upper stage
/ˈstɒp ˈbaθ/
n
中文：可贮存推进剂上面级
中文 · 可贮存推进剂上面级Español · etapa superior del tanque de propelenteFrançais · étage à propergol stockable
Meaning：Upper stage used to propel the payload toward its final orbit.