For a soma to work, most of its component cells have to accept they are the end of the line-which, given that that line in question stretches back unbroken to the first living organisms more than 3 billion years ago, is a hard thing to do.

• 要躯体运作，其大多数组成细胞必须接受它们是整条生产线的终端，做到这一点并非易事，尤其当被告知这条受到质疑的生产线从在30亿年前的第一批生命中至今都从未中断过。