They are carelessly written or drawn.
它们写得或画得都很随便。
"I forget them after I kill them," he replied carelessly.
“我杀了他们以后就忘了他们。”他漫不经心地回答。
"You did a little," Peter said carelessly, and continued to dance.
“你做了一点儿。”彼得漫不经心地说，继续跳着舞。
