impetus
英 ['ɪmpɪtəs]
美['ɪmpɪtəs]
- n. 动力；促进；冲力
考试真题
- One impetus for the policy is that companies are already starting to build massive constellations, comprising hundreds or thousands of satellites with many moving parts among them.
2019年6月六级真题（第二套）阅读 Section C