The first is productive efficiency: the idea that products are being made at their lowest possible cost.

第一个是生产效率，即产品以尽可能低的成本生产。

He could teach his students nothing; he was only educating himself at their cost.

他什么也教不了他的学生； 他只是在以他们为代价来教育自己。

Normally he would be swept up and adopted into a loving home but because many people are struggling to pay for their rising cost of things at the moment less people can afford to take in an extra pet.

通常情况下，他会被扫地出门并被收养到一个充满爱意的家中，但由于目前许多人都在努力支付不断上涨的物价，因此越来越少的人有能力再多养一只宠物。