基本解释液体比重计英汉例句双语例句Hydrometer: An instrument used for measuring the specific gravity of a liquid or solution.比重计：量度液体或溶液的比重的仪器。specific gravity hydrometer更多例句词组短语短语hydrometer specific gravity hydrometer 液体比重计specific gravity hydrometer更多词组专业释义物理学液体比重计