直接能源 meaning in English

direct energy source

The view that phosphocreatine was the direct source of energy for muscular contraction lasted only a few years .
认为磷酸肌酸作为肌肉收缩直接能源的观点，流行了不过数年。
Glucose , which forms when the body digests carbohydrates , is the primary source of energy in the body ? that is , it is the main material used by cells for making atp , or adenosine triphosphate , the molecule that directly powers most cellular activities
人体消化碳水化合物后形成的葡萄糖，是身体最主要的能量来源也就是说，它是细胞用来制造atp （三磷酸腺苷，大多数细胞活动的直接能源）的最主要物质。