normal energy level

基本解释

The experimental mice did not eat the full amount presented to them yet their energy expenditure remained at a normal level.
实验组小鼠没有吃光提供给它们的全部食物，但它们的能量消耗仍处于正常水平。
Under normal conditions, atoms contain two electrons per energy level surrounding their protons, with the electrons spinning in opposite directions.
在正常条件下，原子含有每周围的质子能级两个电子，与纺纱在相反方向上的电子。
The aim of both teams is to tap into high-altitude wind, which is an energy source that is more abundant and reliable than the ground-level wind on which normal turbines depend.
两个研究小组的目的是一致的：利用更加丰富、稳定的高海拔风能发电，而普通的涡轮发电机则依赖于地表风能。