If you examine the metabolic rates of the twosexes you establish that the higher male metabolic rate roughly accounts for the lower male life span.
如果你研究两性的代谢率，你就会发现，男性较高的代谢率大致解释了为何他们寿命较短。
2
Of course, learning does vary a lot between individual students, but research reliably shows that this variance is far greater within populations of boys or girls than between the twosexes.