the emperor of Russia in the past Czar Nicholas II 沙皇尼古拉二世
(in compounds 构成复合词 an official whose job is to advise the government on policy in a particular area （在某领域向政府提供有关政策的建议的）政府顾问，政府高级官员 - (British English)
a drugs czar 毒品沙皇 - (North American English)
a drug czar 毒品沙皇
- (British English)