关键性问题 meaning in Chinese

critical issues of overall and strategic significance to shanghai’s development

Control of fire is one of the key issues in crash survival
火情的控制是坠机存活的一个关键性问题。
Listen and respond to any questions student a asks you
谈判很成功，你需要对几个关键性问题表示同意。
Several key problems in designing a combined machine for deep gun drill
深孔枪钻组合机床设计中的几个关键性问题
Key issues to establish the industry sustainable development index system
行业可持续发展指标体系建立中的关键性问题
Irregular shape nesting problem concerns two key problems : ( 1 )
任意形状优化排样问题集中体现了两个关键性问题：

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