pivot         
 noun [ C ] uk/ˈpɪv.ət/ us/ˈpɪv.ət/
 枢轴;支点
a fixed point supporting something that turns or balances
  关键人物;枢纽
the central or most important person or thing in a situation
  The former guerrilla leader has become the pivot on which the country's emerging political stability turns/revolves (= it depends on him). 前游击队领导人成了决定该国政治稳定与否的关键人物。 
 pivot  
verb uk/ˈpɪv.ət/ us/ˈpɪv.ət/ -tt-
  (TURN)      
 [ I or T ]转动;扭曲 
to turn or twist
  She pivots her left foot. 她扭了左脚。 
 He pivoted on his heels and headed out. 他脚跟一转,向外走去。 
 Future deals will pivot on (= depend on) easing commercial conflicts. 未来的协议将取决于疏缓商业冲突。 
 Synonym: swivel