例如，能非常简单地计算出它们向太空中释放的能量有多少通过掌握它们随时间释放的能量变化。
For example, it's easy to calculate how much energy they are pouring into the Universe by studying the way their output of energy changes with time.
要想掌握营养学基本知识，就要了解食物种类，并对能量(卡路里)以及健康饮食中每种营养物质起到何种作用有深入的了解。
Mastering the nutrition basics comes down to understanding the food groups and becoming more aware of calories and the roles that specific nutrients play in a healthy diet.
在那些时刻，其实是我们的身体掌握了主导权，血液加速我们的视觉更敏锐、脑力更强、提供给肌肉更多的氧气恶化能量。
At those moments, our bodies actually take over and increase blood flow so that we have greater visual acuity, increased mental capacity and more oxygen and fuel for our muscles to use.
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