It is energy expenditure that is satisfying.

消耗精力才真正给人以满足。

A new study reveals that this massive energy expenditure is worth it.

一项新研究表明，蓝鲸这种巨大的体力支出是很值得的。

Together, the studies suggest that bone plays a part in energy expenditure, Clemens says.

克莱门斯说，这两项研究都表明了骨骼在能量消耗中的重要地位。

In sum, technology has given us this surfeit of calories and dearth of energy expenditure.

总而言之，技术给了我们过高的热量，又减少了能量支出。

Finally, the researchers plotted walkers' heights against their minimum energy expenditure.

最后，研究者用图形标注出了步行者的身高和最低能量消耗的关系。