1. 维持：firepower:火力 | sustainment:维持 | protection:保护
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1. " So we do not perceive Russia's nuclear sustainment and modernization activities as threatening, " he said.
sustainment
noun
1. the act of sustaining life by food or providing a means of subsistence
e.g. they were in want of sustenance
fishing was their main sustainment
Synonym: sustenance sustentation maintenance upkeep