5an instructor demonstrates water combat techniques to prospective SEALs.

教官在给准海豹队员们演示水下的作战技巧。

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The WMF also called for immediate action to combat water infiltration and structural deterioration at the cathedral church of St Michael in Coventry, England.

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To try to combat the problem, the agency has twice released better-oxygenated water from Kielder Reservoir into the river in an effort to help salmon move out of the estuary and into the freshwater section of the river.

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But Zafar Adeel of the United Nations University International Network on Water, Environment and Health, an expert on water management and a leading author of the report, warned that more needed to be done to combat desertification.

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