equanimity

即使面对客户的激烈投诉，经理依然保持镇定自若。

The manager kept his ___equanimity even when dealing with the customer's angry complaint.

尽管急诊室里一片混乱，主刀外科医生仍以非凡的镇定继续工作。

Despite the chaos in the emergency room, the attending surgeon worked with remarkable ___equanimity.

当登机口工作人员宣布航班将延误七小时时，他完全失去了镇定。

He lost his ___equanimity entirely when the gate agent announced the flight would be delayed by seven hours.