labour under

例句：

1. He labours under the delusion that he's a fine actor.
   他有個錯覺，以為自己是個好演員。
2. Bill took ages to do the job because he was labouring under the delusion that every part had to be painted three times, not just the once that was required.
   比爾花了很長時間幹這項工作，因為他誤解了，認為每部分必須刷3遍，而實際上只需刷一遍。