ADJ
中枢的；关键的
A pivotal role, point or figure in something is one that is very important and affects the success of that thing.
例句
The Court of Appeal has a pivotal role in the English legal system...
上诉法院在英格兰司法体系中起着中心作用。
The elections may prove to be pivotal in Colombia's political history.
这一选举可能成为哥伦比亚政治史上关键的一次。