基本解释[经济学]变速泵英汉例句双语例句Finally, the optimization result of water source heat pump set under the variant working conditions can be received.最终获得水源热泵机组的变工况优化设计结果。词组短语短语variant t pump 变速泵speed -variable pump variant pump 变速泵专业释义经济学变速泵