他们连安全的饮用水都难以获得，更不用说医疗保健了。
They are unable to access safe drinking water, let alone health care.
从污水获得饮用水，对许多人来说，是一种在心理上难以接受的观念。
The idea of obtaining potable water from waster-water is a psychologically difficult one for many people to accept.
至于FLEX所担心的唯一问题就是对于咖啡中的刺激物过于敏感的人群来说，饮用咖啡会导致他们的难以入睡。
As far as FLEX is concerned, the only problem with coffee consumption is that it can inhibit sleep for people who are sensitive to its stimulant effects.
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