Eighty million years ago, dinosaurs ruled the earth.
八千万年前，地球是恐龙的天下。
Standards in health care have improved enormously compared to 40 years ago.
与40年前相比，卫生保健的水平得到了极大提高。
Twenty million years ago, Idaho was not the arid place it is now. Rather, it was warm and damp, populated by dense primordial forest.
2000万年前，爱达荷州不像现在这样干旱。确切地说，它那时温暖潮湿，生长着茂密的原始森林。
Many years ago, there was a Greek king named Midas.
许多年前，有一位名叫迈达斯的希腊国王。
My grandparents moved to the countryside six years ago.
我的祖父母六年前搬到了乡下。
Not long ago, she shared some useful studying tips online.
不久前，她在网上分享了一些有用的学习技巧。
Qu Yuan was born in Zigui of Hubei Province over 2,200 years ago.
2200多年前，屈原出生于湖北省秭归县。
My kids decided a few months ago that peek-a-boo was their favorite game.
就在几个月前，我的孩子们决定，躲猫猫是他们最喜爱的游戏。
When our family moved to the United States six years ago, none of us spoke any English.
六年前我们全家搬到美国时，我们谁也不会说英语。
The practice of paying children an allowance became popular in America about 100 years ago.
大约100年前，给孩子们零花钱的做法在美国开始流行。
More than fifty years ago, the United Nations declared that literacy is a basic human right.
五十多年前，联合国宣布识字是一项基本人权。
The English-Chinese dictionary my father bought for me many years ago is still of great help.
我父亲多年前给我买的英汉词典仍然很有用。
The Maker Movement is rediscovering learning by doing, which is Dewey's phrase from 100 years ago.
创客运动正在重新发掘“从做中学”的意义，这一概念最早由杜威在100年前提出。
The history of using chopsticks in China dates back to the Shang Dynasty, more than 3,000 years ago.
在中国，使用筷子的历史可以追溯到3000多年前的商朝。
On a snorkeling trip in Bermuda a few years ago, we met a terrier named Lexi, who liked to fetch rocks.
几年前，在百慕大的一次浮潜旅行中，我们遇到了一只名叫莱西的小猎犬，它喜欢捡石头。
About 5,000 years ago the Egyptians and other people in the Near East began to use pictures as a kind of writing.
大约5000年前，埃及人和其他近东地区的人开始将图画作为一种书写方式。
Though Qu Yuan died thousands of years ago, he is remembered every year for his loyalty to his country and his people.
虽然屈原在几千年前就去世了，但人们每年都纪念他，因为他忠于国家，忠于人民。
Many centuries ago, in West Africa, traditional storytellers played musical instruments while they were telling stories.
许多世纪以前，在西非，传统的说书人一边讲故事，一边演奏乐器。
Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate than the world we can see and hear.
150多年前，查尔斯·达尔文设想了另一个世界，比我们所能看到和听到的世界更忙碌、更嘈杂、也更亲密。
A century ago, chemist Svante Arrhenius started one of the first debates over the potential for humans to influence the planet's climate.
一个世纪前，化学家斯万特·阿伦尼乌斯就人类影响地球气候的可能性展开了最早的辩论之一。
I first discovered the Napoleonic cryptographic battle a few years ago when I was reading Sir Charles Oman's epic History of the Peninsular War.
几年前，我在阅读查尔斯·奥曼爵士的恢弘巨著《半岛战争史》时，第一次发现了拿破仑时期的密码战。
A century ago Octavia Hill launched the National Trust not to rescue stylish houses but to save "the beauty of natural places for everyone forever."
一个世纪之前，奥克塔维亚·希尔发起建立了国民信托组织，不是为了拯救时尚的楼房，而是“为公众永远保存自然场所之美”。
China was the first country in the world to cultivate silkworms and develop silk weaving. More than 3,000 years ago, sericulture and silk weaving were already significantly developed.
中国是世界上最早发明养蚕和丝织的国家；早在3,000多年以前，蚕桑、丝织已相当发达。
In the state of Iowa, Diane Ott Whealy wanted to protect historic plant varieties, like the seeds her great-grandfather brought to the U.S. from Germany more than a hundred years ago.
在爱荷华州，黛安·奥特·惠利希望保护具有历史意义的植物品种，比如她的曾祖父100多年前从德国带到美国的种子。
Years ago, Ben Casnocha mentioned an idea to me that I haven't been able to shake: The people who are most likely to change our minds are the ones we agree with on 98 percent of topics.
几年前，本·卡斯诺查曾向我提到一个让我一直无法忘怀的观点：最有可能改变我们想法的人是那些我们在98%的话题上能达成一致的人。
Clara, having just a moment ago opened her eyes, looked about her in amazement.
克拉拉刚刚睁开眼睛，惊讶地环顾四周。
It dates from over 2,000 years ago.
它的历史可以追溯到2000多年前。
It was a small village many years ago.
许多年前，这里还是一个小村庄。
She looks as young as she was ten years ago.
她看起来和十年前一样年轻。
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