when they ate their plant food cooked rather than raw.吃熟食时能比生食得到更多能量

rather than而非...；替代...

It is a telex rather than a letter.

与其说它是一封信，不如说它是一封电传。

After all, the process of heating food does not increase the number of calories in it.毕竟，加热食物的过程并不会造成食物内含热量的增加

after all毕竟；到底；终究

I'll have to go to my aunt's funeral she was my own flesh and blood after all.

我得参加我姑姑的葬礼－－她是我的亲人哪。

The old methods proved best after all.

采用老方法结果反而是某事物最好。

It simulates the process of breaking down our food,它模拟食物在我们消化系统内

break down分解

The machine must break down at this busy hour.

正忙的时候，机器偏偏又坏了。

He finally break down under the four-hour's strain.

在四小时的压力下他终于支持不了。