pivotal

形容词 pivotal:

1. being of crucial importance
   同义词：polar

1. The capital and largest city of Algeria, in the north on the Bay of Algiers, an arm of the Mediterranean Sea. An ancient North African port, Algiers was captured by French forces in1830 and was later a pivotal center of the struggle for Algerian independence. Population, 1,523,000.
   阿尔及尔阿尔及利亚的首都和最大的城市，位于地中海海湾阿尔及尔湾的北面。阿尔及尔是一个历史悠久的北非港口，于1830年为法军所占领，以后又成为阿尔及利亚独立运动的中心。人口1,523, 000

piv.ot.al

adj.（形容词）
Of, relating to, or serving as a pivot.
枢轴的：枢轴的、与枢轴相关的或作为枢轴的
Being of vital or central importance; crucial:
中枢的，关键的：起中心的或极重要作用的；关键的：
例句：
.Its pivotal location has also exposed it to periodic invasions.(Henry A. Kissinger)
.其地点的重要性也使得它周期性地遭受侵略.(亨利A.基辛格)

【引伸】
piv.otally
adv.（副词）