翻译词组“trains of vacuum"？ 试着翻译成 真空组列，不准确。还是说下对 train 的理解吧，可参考下下面这段话。 the break-down into units should be such as to allow optimum operational flexibility. for instance in the case of an installation composed of two separators and two compressors, it shall be assessed whether it is preferable to group them into two identical processing trains comprising one separator and one compressor each, or into a separation unit (comprising both separators) and a compression unit (comprising both compressors). input for such arrangement shall be provided by the operating philosophy. 可见 train 和 unit 都是对设施系统分解后得到的单元，根据不同的运行理念，一是分解成几个相同且独立的系列，一是分解成功能单一的组。查看更多
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