Racism is a deeply rooted prejudice which has existed for thousands of years.
种族主义是一种已存在了数千年的根深蒂固的偏见。
Ant societies existed in something like their present form more than seventy million years ago.
蚂蚁社会大约在七千万年前就以类似现在的形式存在。
Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars.
照片证据表明，液态水曾大量存在于火星表面。
To begin with, they will have to find out whether life has ever existed on the planet of Mars in the past.
首先，他们必须搞清楚火星上是否曾经存在过生命。
With the development of technology, many things which only existed in science fictions are brought into our daily life.
随着科技的发展，许多过去只存在于科幻小说中的东西被带入了我们的日常生活。
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。
An obsession with time, saving, gaming, wasting, losing, and mastering it, seems to have been a part of humanity for as long as humans have existed.
人类对时间的执念——对其的节省、玩弄、浪费、丧失及掌控——似乎是人性的一部分，人类存在了多久，执念就存在了多久。
Even setting aside the unproven hints of ancient oceans, the extent of the outflow channels suggests that a huge total volume of water existed on Mars in the past.
即使不考虑未经证实的古代海洋迹象，流出渠道的范围表明，过去火星上存在着大量的水资源。
Prior to 1960, geologists Bowen and Hess disagreed over whether or not the very high temperatures needed to produce magmas rich in magnesium could have existed on Earth.
在1960年之前，地质学家鲍温和赫斯在地球上是否存在产生富含镁的岩浆所需的高温这一问题上存在分歧。
The gastro-pub has existed in various locations in Hong Kong since 2002.
2002年起，美食酒吧已经在香港各地陆续出现。
The earliest libraries existed thousands of years ago in China and Egypt, where collections of records on tablets of baked clay were kept in temples and royal palaces.
中国和埃及早在几千年前就有了最早的图书馆，在这两个国家，烧制陶片上的记录被保存在寺庙和皇宫里。
This is a side of Alan that I never knew existed.
我以前从来不知道艾伦还有这样的一面。
The idea already existed in embryo in his earlier novels.
这个想法在他早期的小说中已初见端倪。
"The possibility certainly existed that it was a kite," he says.
他说：“那确实有可能是风筝。”
What happened to Australia's megafauna, the giant animals that once existed across this enormous continent?
曾经生活在澳大利亚这片广袤大陆上的巨型动物经历了什么？
This administrative calendar existed alongside the earlier agricultural and religious calendar that depended on the heliacal rising of Sirius.
这个行政日历与早期依赖于天狼星偕日升的农业和宗教日历并存。
In the late twentieth century, archaeologists discovered the remains of a sophisticated people whose settlement might have been the hub of a civilization few people even thought existed.
在20世纪后期，考古学家发现了一个复杂民族的遗迹，他们的居住地可能是一个鲜为人知的文明中心。
The work fills (in) a gap which has hitherto existed in our archaeological literature.
这部著作填补了我国考古学文献中的一个空白。
We didn’t even know such sleep existed.
我们甚至不知道还有这么棒的睡眠。
Connectomics actually started before the word existed.
神经连接学实际上远在这个名词出现前就已经存在了。
Peace and harmony existed between her and the clouds.
她和云终于可以和谐相处了。
A year before, I had not known that ancient Greek still existed.
一年前，我根本不知道古希腊语仍存在。
Without question, a strong bond existed between the two friends.
这两个朋友之间的纽带关系无疑是牢固的。
He must be permitted to speak of that Paris as though it still existed.
请允许他谈那旧时的巴黎，好象它现在仍然存在一样。
Until my diagnosis, I had no idea that nonverbal language even existed.
在获得诊断之前，我对非语言信息的存在一无所知。
But Einstein solved problems that others had not really understood existed.
而爱因斯坦则解决了其他人完全不知道还存在的问题。
But Einstein solved problems that others had not really understood existed.
而爱因斯坦则解决了其他人完全不知道还存在的问题。
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