prohibition sign

基本解释

The sign in the picture is designed to indicate the reasons for warning or prohibition.
图中标志的含义是表示警告、禁令的理由。
flymote.com

Every sign shows that Mr Obama has embraced cannabis prohibition due to the massive industries that have sprung up to support it.
FORBES: NAACP Joins Coalition to End the War on Drugs
If you agree that prohibition must end then please print out copies of Declaration of Rights of Cannabis Users, date and sign them and send them to ALL YOUR elected representatives AND to the United Nations.
FORBES: Majority Of Americans Now Favors Marijuana Legalization, Study Finds