Caffeine, the stimulant in coffee, has been called "the most widely used psychoactive substance on Earth".
咖啡中的咖啡因因被称为“地球上使用最广泛的精神活性物质”。
Objective: To get information on drug and psychoactive substance use among secondary school students in economically developed regions.
目的：了解经济发达地区中学生使用药物与精神活性物质的情况。
Objective: To understand the basic situation, characteristics and consequences of central stimulants and other related psychoactive substance abuse.
目的：调查全国部分地区中枢兴奋剂及相关非法精神活性物质滥用的基本情况、特点和危害。
Objective: To understand the basic situation, characteristics and consequences of central stimulants and other related psychoactive substance abuse.
目的：调查全国部分地区中枢兴奋剂及相关非法精神活性物质滥用的基本情况、特点和危害。
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