They are carelessly written or drawn.

　　它們寫得或畫得都很隨便。

　　"I forget them after I kill them," he replied carelessly.

　　“我殺了他們以后就忘了他們。”他漫不經心地回答。

　　"You did a little," Peter said carelessly, and continued to dance.

　　“你做了一點兒。”彼得漫不經心地說，繼續跳著舞。