Caffeine, a substance found in coffee and some soft drinks, is also a drug.

咖啡因，咖啡和一些不含酒精的饮料中的一种物质，也是一种毒品。

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Source: U.S. Food and Drug Administration, National Soft Drink Association, Center for Science in the Public Interest.

资料来源：美国食品和药物管理局，国家软饮料协会，公众利益科学中心。

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Known as Natural Cycle or soft IVF, it centres on single - embryo IVF treatment involving minimal drug stimulation.

以自然周期或软ivf为例，它以单胚胎ivf为中心，而且只需最小的药物刺激。

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While legalisation of cannabis, a so-called soft drug, is a perennial debate, heroin and crack occupy the other end of the spectrum.

BBC: NEWS | UK | Magazine | The cocaine paradox

The report recommends that it should be downgraded and treated like cannabis as a soft, relatively harmless drug.

ECONOMIST: Going Dutch?

But despite the hype, the overall economic effects of "soft addictions" pale in comparison with traditional "hard addictions" like drug abuse and alcoholism.

FORBES: The Most Expensive Addictions