pivotal
	英 ['pɪvətl]
美['pɪvətl]
	    
	
    - adj. 关键的;中枢的;枢轴的
 
- n. 关键事物;中心事物
 
    
	 
    英英释意
	
	- 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"