“一五一十”，汉语成语，字面意思是“count by fives or tens”，比喻叙说时从头到尾，原原本本，没有遗漏。可以翻译为“tell the whole story或give a detailed account”等。

例句：

他把这事一五一十地告诉了我。

He told me everything that had happened.