Our mental make-up is suited to a life of very severe physical labour.

我们的心理构成适合于重体力劳动的生活方式。

But he also mused that by assisting mental labour, AI might have as big an effect on society as the Industrial Revolution's assistance of physical labour has had.

但他也认为， 通过协助脑力劳动，人工智能可能会对社会产生与工业革命协助体力劳动一样大的影响。

First, to prevent output falling as more people retire, machines are necessary to substitute for those who have left the workforce or to enable ageing workers to continue to do physical labour.

首先，随着退休的人越来越多，为了防止产出下降，必须以机器替代那些减少了的劳动力或协助老龄工人继续从事体力劳动。

She did not reply, and they stood looking musingly at Clym as he slept on in that profound sleep which is the result of physical labour carried on in circumstances that wake no nervous fear.

她没有回答，他们两人沉思地望着克林，他正继续酣睡，这是在没有精神压力的情况下从事体力劳动的结果。