空气与蒸汽进行热交换，所需的冷却空气通常由机械通风方式供应。的翻译：Exchange hot air and steam, the required cooling air typically supplied by a mechanical ventilation system. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Air and steam for heat exchange, cooling air is usually required mechanical ventilation supply.

Exchange hot air and steam, the required cooling air typically supplied by a mechanical ventilation system.

The air and the steam carry on the heat change, needs the cooling air usually supplies by the artificial draft way.

Air and steam for the required air cooled heat exchangers, usually by mechanical ventilation supply.

Exchange hot air and steam, the required cooling air typically supplied by a mechanical ventilation system.