很多年前，一种新式的步行者在巴黎出现。
大约一千年前，一个对北极环境有独特适应力的群体出现了。
Around a thousand years ago, one group emerged that was uniquely well adapted to cope with the Arctic environment.
想想对冲基金的出现，20或25年前，对冲基金是雷达屏幕上的一个光点。
Think about the advent of hedge funds, twenty or twenty-five years ago, hedge funds were a blip on the radar screen.
一些学者认为人类和猿的分化出现在一千五百万到两千万年前。
The split between humans and living apes is thought by some scholars to have occurred 15 to 20 million years ago.
从火星熔岩流上出现的少量陨石坑中，我们可以估计，在5亿年前，这个星球上的火山还很活跃——也许现在依然活跃。
From the small number of impact craters that appear on Martian lava flows, one can estimate that the planet was volcanically active as recently as a half-billion years ago—and may be active today.
15年前，一面蓝军旗代表意大利出现在国际体育赛事上。
Fifteen years ago, an Azzurro represented Italy in international sporting competitions.
它最早出现在3000多年前，代表了中国的独奏乐器传统。
It first appeared over 3,000 ago and represents China's solo musical instrument tradition.
研究人员发现毒液甚至在蛇出现之前就已经进化出来了，大约在一亿年前。
The researchers found that venom evolved before snakes even existed, about a hundred million years before.
原色的概念，特别是以红色、黄色和蓝色作为原色的概念，是直到大约200年前才出现的。
The idea of primary colors, and specifically the idea of red, yellow and blue being the primary colors, didn't exist until about 200 years ago.
当夏威夷群岛从大约500万年前开始以火山的形式出现在海面上时，它们远离其他陆地板块。
When the Hawaiian Islands emerged from the sea as volcanoes, starting about five million years ago, they were far removed from other landmasses.
几年前，她开始对鸡蛋产生兴趣，并学习传统乌克兰技术，来画出现代感十足的角色。
Several years ago, she became interested in eggs and learned the traditional Ukrainian technique to draw her very modern characters.
美洲巨型动物的消失——猛犸象、剑齿猫、巨型树懒等等——发生在人类出现后不久，大约在一万三千年前。
The disappearance of megafauna in America—mammoths, saber-toothed cats, giant sloths, among others—happened relatively soon after the arrival of human beings, about 13,000 years ago.
人类最早出现在几百万年前，但直到15万到20万年前，才出现了文化、语言、宗教和艺术。
The earliest humans arrived several million years ago, but only 150,000 to 200,000 years ago, did cultures, language, religion and the arts arise.
绿色营销似乎是最近才出现的，但广告专业人士几十年前就对它产生了兴趣。
Green marketing seems recent, but advertising professionals grew interest in it several decades ago.
中国最早的风筝出现在2000多年前。
The first ancient Chinese kite appeared more than 2,000 years ago.
十多年前，德文郡水獭河中出现了一个海狸家族。
Over ten years ago, a family of beavers turned up in a part of the river Otter, in Devon.
它们的放归野外，是自70年前美洲虎几乎灭绝以来阿根廷该地区首次重新出现美洲虎的身影。
Their release was the first reintroduction of jaguars in that part of Argentina since the species almost died out there 70 years ago.
一些科学家认为，5亿年前出现在地球上的第一批植物可能看起来是紫色的，而不是绿色的。
Some scientists believe that the first plants to appear on Earth over 500 million years ago probably looked purple, not green.
新兴市场出现的新贵们和150年前英国的中产阶级的品味不谋而合。
The newly affluent in emerging markets echo the tastes of the English middle class 150 years ago.
三年前，苹果出现了问题。
若它们的速度恒久不变，那它们在上一个几十亿年前就存在了。那宇宙是怎么出现的？
If their speed had been constant, they would all have been on top of one another billions of years ago. Was this how the universe began?
几千年前的欧洲，红头发的人因为基因变异的关系凭空出现。
The redhead sprang from a mutated gene in Europe thousands of years ago.
八宝粥最开始出现是在900年前的宋朝。
The eight-treasure porridge was first introduced to China in the Song Dynasty about 900 years ago.
有些较大的可能在1亿年前出现。
Many of the larger ones would have started arriving about 100m years ago.
这个概念早在50多年前就出现了，不过我们可以想出人们仍在进行“群体思维”的很多例子。
That idea came up more than 50 years ago, but we can think of lots of examples where people still engage in group think.
14年前当罗索利诺第一次出现躁郁症的迹象时，家人就表示出了担忧。
They expressed concerns about her behavior 14 years ago, when she first started showing signs of bipolar disorder.
14年前当罗索利诺第一次出现躁郁症的迹象时，家人就表示出了担忧。
They expressed concerns about her behavior 14 years ago, when she first started showing signs of bipolar disorder.
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