1careless (about/with sth) not thinking enough about what you are doing so that you make mistakes 粗心:
Jo's very careless.乔很粗心。The accident was caused by careless driving.这次意外是鲁莽驾驶所致。
2 resulting from a lack of thought or attention to detail 疏忽引起的:
a careless mistake疏忽造成的错误 ➔carelesslyadvShe threw her coat carelessly on the chair.她把外套随便扔在椅子上。 ➔carelessnessnoun [U]