He made a careless mistake in the math exam and lost several points.（他在数学考试中犯了一个粗心的错误，丢了几分。）

The careless driver caused an accident because he was distracted by his phone.（这位粗心的司机因为被手机分心而引发了一场事故。）

She is often careless about her appearance and doesn't pay much attention to details.（她经常对自己的外表很粗心，不太注意细节。）

Tom was so careless that he left his keys at the office again.（汤姆太粗心了，又把钥匙落在办公室了。）

The careless worker damaged the machine due to his lack of concentration.（这位粗心的工人由于注意力不集中损坏了机器。）

His careless attitude towards work led to his dismissal.（他对工作粗心的态度导致了他被解雇。）

They were careless with their money and soon ran out of it.（他们花钱很粗心，很快就把钱花光了。）

The report was full of careless errors, making it unreliable.（这份报告满是粗心的错误，使其不可靠。）

Being careless while cooking can result in a kitchen fire.（做饭时粗心可能会导致厨房起火。）

The painter's careless brushstrokes made the painting look messy.（画家粗心的笔触使这幅画看起来很凌乱。）

You should not be so careless when handling important documents.（处理重要文件时你不应该这么粗心。）

Her careless remarks hurt her friend's feelings.（她粗心的话伤害了朋友的感情。）

The child was careless when riding his bike and fell down.（这个孩子骑自行车时粗心大意，摔倒了。）

A careless approach to this project will only lead to failure.（对这个项目粗心的做法只会导致失败。）

The writer made some careless omissions in the manuscript.（这位作家在稿件中犯了一些粗心的疏漏。）

He is always careless about his health and rarely exercises.（他总是对自己的健康粗心大意，很少锻炼。）

Their careless behavior in the library disturbed other readers.（他们在图书馆里粗心的行为打扰了其他读者。）

The builder's careless construction led to some problems with the house.（建筑工人粗心的施工导致房子出现了一些问题。）

Don't be careless with your personal information online.（在网上不要对你的个人信息粗心大意。）

The student's careless spelling mistakes lowered his grade in the composition.（这个学生粗心的拼写错误降低了他作文的分数。

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