And it reduced the  overall weight of the aircraft and freed up vital space in the belly of the aircraft.

它还减轻了飞机的整体重量，并释放了飞机腹部的重要空间。

One 2012 study in fact showed that, when compared to one another, cardio indeed is the benefactor of overall weight loss and even fat loss.

相较于其他运动，有氧运动是减重和减脂的一大助力。

This level of utilisation actually makes the brain the most energy-expensive organ in the body, and yet it makes up only 2% of the body's weight overall.

这种能量消耗水平实际上也使大脑成为我们身体中最消耗能量的器官，然而，它的重量却只有人体总重量的2%。