But the families being tracked reduced energy use 2.7 percent.

而被告知监测的家庭使用的电力减少了2.7%。

Faced with severely limited resources, a smaller-sized child with reduced energy requirements will, in fact, have a better chance of living to adulthood.

面对有限的资源，能量需求小的个头小的孩子事实上能增加长到成年的几率。