| Subject | English | Arabic |
| environ. | energy utilisation pattern | نمط استخدام الطاقة |
| el.gen. | utilisation factor of the maximum capacity of a unit | عامل الاستعمال للسعة القصوى للوحدة |
| environ. | utilisation of calorific value Calorific value is the heat per unit mass produced by complete combustion of a given substance. Calorific values are used to express the energy values of fuels; usually these are expressed in megajoules per kilogram. They are also used to measure the energy content of foodstuffs; i.e. the energy produced when the food is oxidized in the body. The units here are kilojoules per gram. Calorific values are measured using a bomb calorimeter (apparatus consisting of a strong container in which the sample is sealed with excess oxygen and ignited electrically. The heat of combustion at constant volume can be calculated from the resulting rise in temperature) | استغلال قيمة السعرات الحرارية |
| environ. | utilisation of pesticides Use of chemical or biological substances to deliberately kill unwanted plants or animals | استخدام المبيدات |
| el.gen. | utilisation period at maximum capacity of more units | فترة استعمال القدرة القصوى لاكثر من وحدة |
| el.gen. | utilisation period at maximum capacity of one unit | فترة استعمال القدرة القصوى لوحدة واحدة |