Officials say they've only scratched the surface of the drug problem.官员们说他们仅仅触及到了毒品问题的表面。

We had only two weeks to tour Malaysia, which was hardly enough time to scratch the surface.我们只有两周时间游览马来西亚, 连走马观花都不够。

Even this fairly complex analysis only begins to scratch the surface.就连这一比较复杂的分析也是刚刚触及皮毛而已。