Customers complained about the callous way the airline handled their canceled flights.

顧客抱怨航空公司處理航班取消時態度冷漠無情。

The manager's callous email announcing the layoffs upset many loyal employees.

經理宣布裁員的那封冷酷電子郵件，讓許多忠誠的員工很難過。

Investors criticized the board for its callous disregard for workers' safety concerns.

投資人批評董事會冷酷地無視員工對安全的疑慮。