Though taking care of her grandmother takes her lots of energy, Sally has tried to stay on top of all her courses.

尽管照顾祖母花费了她很多精力，莎莉还是努力在所有课程上保持领先。

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By understanding the cycles of energy we can stay filled with energy and avoid burnout.

通过了解精力的周期，我们可以保持充满了能量从而避免疲惫。

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However, some animals have body temperatures that are naturally lower and therefore do not need to use as much energy to stay warm.

然而有些动物的体温天生较低，因此并不需要消耗这么多的能量来保持体温。

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So should consumers stay away from energy drinks, or supplements?

CNN: Monster Energy adds caffeine content to labels

"As Spider-Man I was wired the whole time, " says the 24-year-old actor, munching on an energy bar to stay fueled on a recent nippy Cambridge morning.

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"Without the federal loan guarantee program, private-sector capital earmarked for this and other clean-energy projects will stay on the sidelines, " NRG Chief Financial Officer Christian Schade said by email.

WSJ: Proposal Aims to Gut DOE Loan Program