witches' brew
noun [ C usually singular ] informal uk/ˌwɪtʃ.ɪz ˈbruː/ us/ˌwɪtʃ.ɪz ˈbruː/
（令人不快或危险的东西的）大杂烩
a mixture of unpleasant or dangerous things
The smog is composed of a witches' brew of car exhaust and smoke from factories. 雾霾是汽车尾气和工厂废气的混合物。
（困难或危险的）杂乱局面
a situation that has many different parts that are difficult and dangerous
The country is in turmoil, a witches' brew of poverty and warfare. 这个国家处于一片混乱之中，充斥着贫困与战乱。