He labours under the delusion that he's a fine actor. 他有个错觉,以为自己是个好演员。
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. 比尔花了很长时间干这项工作,因为他误解了,认为每部分必须刷3遍,而实际上只需刷一遍。