ago简单

Now, researchers have used genomes of over 200 donkeys to trace their domestication back to a single event around 7,000 years ago in East Africa — about 3,000 years before humans tamed horses.

如今，研究人员利用200多头驴的基因组，将驴的驯化追溯到大约7000年前发生在东非的一次单一事件——比人类驯服马早了约3000年。

They also looked at genomes from 15 wild equids and 31 earlier donkeys that lived between about 4,000 and 100 years ago.

他们还研究了15种野生马科动物以及31头生活在约4000年前到100年前之间的早期驴的基因组。

This concept has served as a central goal for curriculum developers, local school boards, business and community leaders, and policymakers ever since its introduction nearly 80 years ago.

自近80年前提出以来，这一概念一直是课程开发者、地方学校董事会、商界和社区领袖以及政策制定者的核心目标。

The slow sea level rise in the Mediterranean [submerged] the city more than 3,000 years ago.

地中海海平面的缓慢上升在3000多年前{{3}}了这座城市。

Five years ago, at summer’s end, Andrew Fusek Peters was diagnosed with bowel cancer. “I was waiting for surgery, feeling really ill, sitting in my garden. It was amazing weather and there were painted lady butterflies everywhere,” he says. “They were a symbol of fragile life, of hope and defiance, and something appealed to my soul.”

五年前的夏末，安德鲁·富塞克·彼得斯被诊断出患有肠癌。“我在等待手术，感觉非常难受，坐在我的花园里。天气好极了，到处都是小红蛱蝶，”他说，“它们象征着脆弱的生命，象征着希望与不屈，有某种东西打动了我的灵魂。”

Nearly 2,000 years ago, as the Romans began to pull out of Scotland, they left behind a curious treasure: 10 tons of nails, nearly a million of the things.

大约2000年前，罗马人开始撤出苏格兰时，留下了一批奇特的宝藏：10吨钉子，将近一百万枚。