The crux of the negotiation was whether the supplier could guarantee delivery by March.

這次談判的關鍵在於供應商能否保證三月前交貨。

In her email, the manager explained that cost control is the crux of this year's budget.

經理在電子郵件中說明，成本控管是今年預算的核心關鍵。

Customer trust is the crux of our service strategy, so every complaint gets a reply within a day.

顧客信任是我們服務策略的關鍵，所以每則客訴都會在一天內回覆。