Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
For millennia the average person's stance toward providing for himself had been, ultimately I'm on my own.
几千年来，一般人对于养活自己的立场是，最终我要靠自己。
Once the soil has been removed by erosion, only the passage of centuries or millennia will enable new soil to form.
一旦土壤被侵蚀，新的土壤只有经过几个世纪或几千年才能形成。
We know that over the past millennia the climate has undergone major changes without any significant human intervention.
我们知道，在过去的几千年里，气候在没有任何大型的人为干预之下发生了剧大变化。
While it is unknown just how much of this is true, it is certainly known that silk cultivation has existed in China for several millennia.
虽然我们不知道这其中有多少是真实的，但可以肯定的是，丝绸栽培在中国已经存在了几千年。
Perhaps even earlier, there had emerged on the steppes of Inner Eurasia the distinctive types of pastoralism that were to dominate the region's history for several millennia.
也许更早的时候，在欧亚大陆内部的大草原上就出现了独特的游牧文化，这种文化主导了该地区几千年的历史。
If represented graphically, the curve for all these changes looks rather like that well-known hockey stick: with little change over millennia and a dramatic upswing over the past decades.
如果用图表进行展示的话，这些变化呈现出来的曲线很像大家熟悉的曲棍球杆：以往数千年都没什么变化，而在过去的几十年内却突飞猛涨。
In the years since the Pleistocene epoch, native species have adapted to the changing environmental there, plants, smaller animals, they have been evolving without megafauna for millennia.
在更新世以来的这些年里，当地的物种已经适应了那里不断变化的环境，植物，小动物，它们已经在没有巨型动物的情况下进化了几千年。
Arching 275 feet and across 290 feet, Rainbow Bridge in the Utah desert has been a source of inspiration and wonderment for millennia.
拱高275英尺，跨度290英尺，犹他州沙漠里的彩虹桥一直是几千年来的灵感和奇迹的来源。
It's every archaeologist's dream to find a lost civilization, to make some huge discovery, to find artifacts no one else has laid a hand on in millennia.
每个考古学家的梦想都是找到一个失落的文明，做出一些重大的发现，找到千年来无人触及的手工艺品。
We have occupied these lands for millennia.
我们占有这块土地已经有几千年了。
The history of bull fighting stretches back millennia.
斗牛的历史迄今已有一千多年了。
Families are matters of millennia, far beyond a few generations.
家庭，事关千年，它远远超越了几代人。
Our cognitive biases have survived for millennia for good reason.
几千年来认知偏差一直存自有它存在的充分理由。
Taiji’s men have chased whales on Japan’s coast for perhaps millennia.
而太地人在日本沿海捕鲸的历史可能已经有上千年了。
But not all white dwarfs will spend many millennia cooling their heels.
不过并不是所有的白矮星都有耐性等上无数个千年。
The mink, by contrast, will remain at large for years, perhaps millennia.
相反的，貂也能自由过上数年，或许千年的太平生活。
Over thousands of millennia a mantle of sediment built up over its bones.
数百万年地幔沉积物堆积在（鲸）的遗骨上。
Over the millennia all manner of styles and materials have been used for shoes.
数千年来，各种造型和原材料用于制鞋。
For millennia, our archipelago has been home to many currents of civilisation.
一千年以来，我们周围的群岛就是许多文明的家园。
Human beings have been seeking effective ways to deal with complexity for millennia.
几千年来，人类一直在寻找解决复杂性的有效方法。
The question has bothered philosophers for millennia and computer scientists for decades.
这个问题困扰了哲学家们上千年，也困扰了计算机科学家们数十年。
Some millennia after my local sea dried up, the Romans started marching around Europe.
几千年后，我脚下的海干涸了，那些罗马人开始在欧洲四围蠢蠢欲动。
Mr Gates is only malaria's latest adversary. The parasite has plagued man for millennia.
疟疾祸害人类千年，盖茨先生最近一个反抗它的对手。
Falling water levels are not the only changes at Lake Suguta over the past several millennia.
在过去的几千年里水位下降并不是苏加塔湖唯一的变化。
Given time time not in years but in millennia life adjusts, and a balance has been reached.
经过了一定时间——不是以若干年计而是以若干千年计的时间——生命开始适应环境，并形成了一种与环境的平衡。
We have been watching grisly death on screen for over a century, and for millennia on stage.
我们在银幕上观看可怕的死亡已经超过一个世纪了，在舞台上也超过了一千年。
They're astronomically brilliant in comparison to anything humans are likely to invent for millennia.
未来几千年，不论人类的发明多么辉煌，和它们相比，不过是璀璨星河中的些微星光。
They're astronomically brilliant in comparison to anything humans are likely to invent for millennia.
未来几千年，不论人类的发明多么辉煌，和它们相比，不过是璀璨星河中的些微星光。
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