developmental phase短语¹⁴⁴⁹⁷²⁺² 基本例句 发育期 In this paper we introduce the developmental phase and experimental equipments of long time delay phase- locked loop and also give the field test results via the satellite“ Symphonic”. 本文叙述了长延时锁相环的研制情况和实验设备，同时也给出了通过“交响乐”卫星的现场试验结果。 cnki