pivotal
	英 ['pɪvətl]
美['pɪvətl]
	    
	
    - adj. 关键的;中枢的;枢轴的
- n. 关键事物;中心事物
 
    英语释意
	
	- 1. being of crucial importance;
- "a pivotal event"
- "Its pivotal location has also exposed it to periodic invasions"- Henry Kissinger
- "the polar events of this study"
- "a polar principal"