These physical and behavioral adaptations minimize the sloth's energy expenditure, or metabolic rate.

这些身体和行为上的适应使树懒的能量消耗或代谢率降到最低。

Researchers have found we make all kinds of behavioral and physiological adaptations when we start increasing the amount of exercise we’re getting every day.

研究者发现我们会做出各种行为和生理上的调整，当我们开始增加每日运动量的时候。

Researchers have found we make all kinds of behavioral and physiological adaptations when we start increasing the amount of exercise we're getting every day.

研究人员发现，当我们开始增加每天的运动量时，我们的各种行为和生理上都会进行适应。