Definition
to reprimand someone severely about their actions, accompanied by a warning of consequences should those actions be repeated.
嚴厲警告（某人）不得再犯，否則將受到懲罰。
The manager called the employees into the office and read them the riot act for their repeated tardiness.
經理把員工叫進辦公室，嚴厲警告他們不准再遲到。
When the children scattered their toys everywhere, she really read them the riot act, making sure they knew it was not okay.
當孩子們把玩具散落得到處都是時，她嚴厲地警告了他們，讓他們知道這是不對的。
After being caught breaking the rules several times, the coach read the team the riot act.
在被抓到多次違反規則後，教練嚴厲警告了整個球隊。