for a space短语⁶³³⁹¹ 基本例句 adv.在一段时间 In order to realize the high spatial and range resolution for a space-borne laser altimeter based on frequency- modulated fiber laser and heterodyne- range detection is proposed. 为使星载激光高度计实现高空间分辨力、高距离精度，提出了联合采用调频光纤激光器和相干测距的方法。 cnoptics