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Heedless of the danger , he returned to the burning building to save his dog .

他不顾危险返回着火的房子救他的狗。

He is heedless of the noises out of the windows .

他没有注意到窗外的嘈杂声。

The boy stepped into puddles with heedless haste .

那男孩匆匆忙忙，结果冒冒失失地踏进水坑。

He is heedless of anything around him .

他对周围的事物毫不留心。

She was rather heedless than forgetful .

她主要是由于疏忽而不是忘记。