求翻译：土石坝的白蚁防治是很复杂而困难的工作，需要综合治理。目前我们所能做的工作是在塑料薄膜上和在水泥土浆中掺入高效无污染除白蚁的药物。以防白蚁侵蚀已修建的防渗墙。是什么意思？

Termite in embankment dam is very complex and difficult task, you need comprehensive management. Now all we have to do is in plastic film and in soil-cement slurry mixed in efficient pollution-free except for drugs of termites. In case termites erosion has built impervious wall.

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