One impetus for the policy is that companies are already starting to build massive constellations (星座), comprising hundreds or thousands of satellites with many moving parts among them. 促进该政策的一个动力是…
The discovery gave fresh impetus to the research. 这个发现为研究带来新动力。
is articles provided the main impetus for change. 他的那些文章是促进变革的主要推动力。