It means to act or take advantage of an opportunity at the right moment, when the person is most likely to succeed.eg: You should strike while the iron is hot.      If you want to get a higher degree, you should strike while the iron is hot.Note:Strike while the iron is hot的意思为趁热打铁，就是机会一旦来临，一定要抓住，才能得到最好的结果。 例如：你要打铁趁热。            假如你想取得高学位，就应该趁热打铁。