慢速英语:中国助美国应对鸦片类药物危机

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opioid –adj. describing a drug that chemically acts like opium based drugs that block pain

narcotic –adj. a powerful drug that affects the brain

synthetic –adj. not natural, made artificially

anesthetic –adj. a drug that causes sleep or uncosciousness

attitudes –n. the way people think about something, feelings that affect one's behavior

trends –n. the way an issue is changing or developing

regulate –v. to control with rules