carelessly
adv. 粗心地；不注意地；无忧无虑地
例句
He carelessly left the door unlocked.
他很粗心，没锁上门。
《柯林斯英汉双解大词典》
The prosecution alleges (that) she was driving carelessly.
控方指控她粗心驾驶。
《牛津词典》
'I don't mind,' he said carelessly.
“我无所谓。”他满不在乎地说。
