old hat片語KK [old hæt] /oʊld hæt/發音片語1過時的、老套的、陳舊的口語Those special effects look old hat compared with today's movies.跟現在的電影比,那些特效看起來已經過時了。2司空見慣、不足為奇口語Working night shifts is old hat to her by now.值夜班對她來說早已是司空見慣的事。