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”。
Caffeine, the stimulant in coffee, has been called "the most widely used psychoactive substance on Earth".
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 get information on drug and psychoactive substance use among secondary school students in economically developed regions.
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.
其中的百分之六十三有情绪障碍，15%患有焦虑症，11%有精神障碍，还有百分之四则是精神活性物质使用障碍。
Sixty-three percent of these had mood disorders, 15 percent had anxiety disorders, 11 percent had psychotic disorders, and 4 percent had substance use disorders.
当男人最可能得孩子的年龄时，抑郁、焦虑、酗酒、精神活性物质的滥用、双相性精神障碍和精神分裂症的发病率达到了顶峰。
The incidences of depression, anxiety, alcohol and substance abuse, bipolar disorder, and schizophrenia peak at the age when men are most likely to have young children.
成瘾是精神活性物质长期作用于大脑而产生的神经适应性改变，而成瘾性物质的奖赏效应则被认为是产生精神依赖的最主要原因。
Past investigations indicated that rewarding effect of abusive drugs is considered as the major reason, which results in addiction especially psychological dependence.
成瘾是精神活性物质长期作用于大脑而产生的神经适应性改变，而成瘾性物质的奖赏效应则被认为是产生精神依赖的最主要原因。
Past investigations indicated that rewarding effect of abusive drugs is considered as the major reason, which results in addiction especially psychological dependence.
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