求翻译：The large, leathery leaves are used in folk medicine to treat infections, indigestion, and other medical conditions. The water extract makes a pharmacologically powerful tea… In southeast Asia, betta breeders add a dried leaf to provide a surface for the bubblenest and to leach substances that protect the fry from diseases. As the leaves decay, they also provide detritus to grow extract-resistant infusoria for the babies. Of 35 aromatic (ring structure) substances identified from these leaves, noteworthy were benzene-acetaldehyde, acetones, and sabinen-hydrate. The first is strongly antimicrobial, and several of the 35 others destroy microbial cell membranes.是什么意思？

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