The manager's nonchalance about the missed deadline frustrated everyone on the project team.

經理對錯過截止日期一副無所謂的樣子,讓專案團隊每個人都很不滿。

The customer was upset by the agent's nonchalance when she reported the billing error.

顧客反映帳單錯誤時,客服人員態度冷淡,讓她很不高興。

He accepted the job offer with surprising nonchalance, as if he had expected it all along.

他以出奇淡定的態度接受了這份工作邀約,彷彿早就料到了一樣。