[cū xīn dà yì]
be negligent; careless; inadvertent; scatter-brain; of a rough heart and big mind; careless and heedless; remiss; thoughtless
I was rather saddened by what he had said and regretted my own carelessness.
我聽(tīng)了他的話(huà)心里有點(diǎn)難過(guò)， 只怨自己太粗心大意了。
Carelessness deserves the blame for many accidents.
許多事故歸咎于粗心大意。