"Careless mistake" 英文表达是犯粗心的错误。这个短语的来源可能源于人们通常会将粗心与疏忽联系在一起，而疏忽则是错误发生的常见原因之一。
例句：
He made a careless mistake in his calculations and ended up with the wrong answer. 他在计算中犯了一个粗心的错误，结果得出了错误的答案。
The company lost a lot of money due to a careless mistake made by one of its employees. 这家公司因一名员工犯的粗心错误损失了很多钱。
The pilot's careless mistake caused the plane to crash. 飞行员的粗心错误导致飞机坠毁。