crucial
/ˈkru:ʃl; `kruʃəl/ adj
~ (to/for sth) very important; decisive 至关重要的; 决定性的
a crucial decision, issue, factor 关键性的决定、 问题、 因素
at the crucial moment 在紧要关头
Getting this contract is crucial to the future of our company. 签订此项合同对本公司的前途至关重要.