How to read this in English professionally? 15 m³/(m³·h） 15 m³/(m³·h）is a ventilation quantity means: 15 cubic meter air offered to 1 cubic meter materiel in every 1 hour. How to read this in English professionally? "15 cubic meter per cubic meter per hour?"

请问写英文的设计方案，应该用什么时态？表达：通过这种技术对垃圾进行处理后可获得燃料和沼气。 Biogas yield would be 50t/d(44000Nm³/d), equivalent to 56Nm³ biogas by each ton of waste. The biogas would be used to generate electricity, in this way, 89426.46kWh of electricity would be achieved. 13246.06 kWh/d would be used for project running, and 76180.40 kWh/d of residual electricity would be sold. 这样写对么？还是要用一般现在时，或者将来时？这是写的一个设计方案，将来可能实施。

A Journey to Jinan I trival often for work. My itinerary go through several cities. One of my old friend living in Jinan City where I have passed many times . But I had never stop to visit her until last Saturday. My friend and I were calssmates during college, and then studied for master's degree in different University. Now we are both working since two years ago. We haven't met each other for about five years. We slept together in her small room. She cooked breakfast for me and led me to the Park of Spouting Spring and the Daming Lake Park. I had been wanted to go to the Daming Lake for a long time because of a classic lines "do you still remember a girl named Xia Yuhe by the Daming lakefront?". And I wanted to see the Spouting Spring very much too, because I read about it when I was very young and it was described beautiful. To my disappointment the water level is low in this season, but I still enjoyed the fascinating beauty of them in spring. I will come here again after the rainy season and take photos with my friend.

在地铁站里用英语指路，想说“你可以从A口出”，请问应该怎么说呢？ 或者想说“我也不清楚，你可以问下地铁站的工作人员”，地铁站的工作人员怎么说呢？staff？worker？functionary？ 请指教~