careless

adj.

1. 粗心的, 草率的
   • A careless mistake cost the company millions of dollars.
     一次疏忽造成了公司数百万美元的损失。
   • Tom is careless in preparing his lesson.
     汤姆准备功课不细心。
2. 随便的, 不介意
   • The student was careless about his personal appearance.
     这个学生不注意个人仪表。
3. 不关心的, 冷漠的