轻浮的，轻佻的;轻狂的 Over-careless;extremely lighthearted过于草率 She was annoyed at 〖with〗 his lighthearted attitude.她对他那种若无其事的态度感到很讨厌。
双语例句
1
If you have time left, go over everything to make sure you haven't made any careless mistakes.
如果你还有时间，就把所有的东西都检查一遍，确保你没有犯任何粗心的错误。
2
Uh, I was careless and knocked over the table.
嗯，我不小心打翻了桌子。
3
The window pane shattered by a baseball, a lamp knocked over by a careless child, or a plate dropped in the kitchen are already broken.The flowers are already dead.