But could an ability to store fat have actually played a crucial role in our evolution?然而儲(chǔ)存脂肪的能力真的在我們的進(jìn)化歷程中起到了關(guān)鍵作用嗎

play a role:起作用；扮演角色

He was invited to play a role in this TV play.

他被邀請(qǐng)?jiān)谶@個(gè)電視劇里扮演一個(gè)角色。

According to obesity geneticist Dr Eric Ravussin,our hunter-gatherer ancestors had to live off whatever they could find.根據(jù)肥胖遺傳學(xué)家埃里克·魯瓦森博士的理論，我們以采集狩獵為生的祖先，必須靠食用他們能找到的東西為生

according to:按照；根據(jù)

He ranged the books according to size.

他照大小順序排列這些書。

live off:依賴 ... 生活

Most of the Asians live off rice.

多數(shù)亞洲人以大米為主食。

I live off the money from my first book.

我靠我第一本書賺的錢生活。

humankind has been subjected to was an important natural selective process人類則要經(jīng)歷重要的自然選擇過(guò)程

be subjected to:受到； 經(jīng)受

She was subjected to indignity and humiliation.

她受到侮辱和羞辱。

This country was once subjected to foreign rule.

這個(gè)國(guó)家一度曾受外國(guó)統(tǒng)治。