VOA慢速英语:WHO: Smoking Costs More Than You Think

patches – n. pieces of material that contain a drug (the material is worn on your skin, enabling the drug to slowly enter your body over a long period of time)

non-communicable – adj. not able to be passed to another person

monster – n. a powerful thing that cannot be controlled and that causes many problems

proliferation – n. rapid increase in number or amount; spread