Spent形容詞:失效的,精疲力盡的動詞:花費,耗費,浪費spent fuel 乏燃料,燃燒過的燃料,廢燃料spent online 網上消費,網上花費spent acid 廢酸,餘酸,粗硫酸spent catalyst 廢催化劑,用過的催...
(in)doing sth)= I spent two yuan on a book...