| 单词 | working substance |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔compression〕The process by which the working substance in a heat engine, such as the vapor mixture in the cylinder of an internal-combustion engine, is compressed.工作物质在热机中的压缩过程，如内燃机中混合蒸汽的压缩美国传统〔working fluid〕A working substance that is a fluid.操作液：一种液态的操作物质美国传统 |
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