stranger danger
noun/ˈstreɪndʒə deɪndʒə(r)/
/ˈstreɪndʒər deɪndʒər/
[uncountable]- the risk to children from people that they do not know who might approach them, seen as something that children should be aware of
不知道谁可能接近他们的人给儿童带来的风险，被视为儿童应该意识到的事情 - The children were all warned about stranger danger.
孩子们都被警告注意陌生人的危险。
Word Origin1960s; earliest use found in The Washington Post. Originally used as a catchphrase in various safety campaigns in the United States - The children were all warned about stranger danger.