how they got on with each other他們之間相處又是如何改變進(jìn)化歷程的

get on with取得進(jìn)展； 與 ... 友好相處； 繼續(xù)做

Do you get on with your parents?

你和父母合得來(lái)嗎?

To find the answer, we need to go back four million years想解開這一謎團(tuán)就要回到400萬(wàn)年以前

go back回去

I may be going back in the fall.

我可能在秋天回去。

He is now fit enough to go back to work.

他現(xiàn)在身體健康，可以回去工作了。

surviving on a diet of raw fruit and vegetables.單靠生鮮蔬果為生

survive on靠 ... 活下來(lái)； 靠 ... 生存

These players have to survive on their wiles.

這些運(yùn)動(dòng)員得靠詭計(jì)才能不被淘汰。

They can survive on very little money.

他們用很少的錢就可以生存。