Crippling health care bills, long emergency-room waits and the inability to find a primary care physician just scratch the surface of the problems that patients face daily.

高昂的医疗费用、急诊室里漫长的等待，以及找不到初级护理医师，这些都只是患者每天面临的问题的冰山一角。

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These examples just scratch the surface of the problem.

这些例子仅仅反映了问题的很少一部分。

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We've only begun to scratch the surface of AI on the Web.

我们只是开始在网络上想象人工智能的外表。

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So, they developed this bifurcated tool, which would be appl--you'd put the stuff on the surface of the tool and then you'd scratch the skin in a certain way so that you could produce sort of a reproducible introduction of the vaccine into the skin.

所以他们发明了一种分为两叉的工具,把疫苗抹在这种工具表面上,然后以某种方式在皮肤上刮,这样就能将疫苗,重复不断地引入到皮下

耶鲁公开课 - 生物医学工程探索课程节选

But entertainment only begins to scratch the surface of how important the tablet market truly is.

FORBES: As iPad Mini Looms, Tablets Give Tech Giants Headaches

But the hugely controversial reorganisation in North Wales didn't even scratch the surface of these changes for their area.

BBC: "Very significant heat in the system"

Companies are only beginning to scratch the surface of what is possible with enterprise social fabric as a transformative communication platform.

FORBES: Unlocking Passion Through Enterprise Social Networks