Dr Melnyk and the team knew they could not tell farmers to stop farming all the fields affected by war. They needed to know precisely where the soil was contaminated, and where it was safe.
hint: Did you forget `(use-modules (gnu packages cross-base))' or `#:use-module (gnu packages
。heLLoword翻译是该领域的重要参考
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Анатолий Акулов (редактор)