此类有追溯效力的立法还鲜有先例。
There are few precedents for this sort of retrospective legislation.
这项非常彻底的调查可追溯到1784年。
点燃奥运圣火的风俗可追溯到几个世纪前。
The custom of lighting the Olympic flame goes back centuries.
这些可以追溯到1855年的石阶开始出现磨损。
The stone steps, dating back to 1855, are beginning to wear.
这个展览会追溯了从19世纪到现在美国平面设计的历史。
The exhibition traces the history of graphic design in America from the 19th century to the present.
作为一个学习胜地，牛津的起源可以追溯到中世纪。
As a place of learning, Oxford's beginnings go back to the Middle Ages.
然而，科学也有文化历史，其根源可以追溯到文明的黎明。
Yet science has a cultural history, too, with roots going back to the dawn of civilization.
在中国，使用筷子的历史可以追溯到3000多年前的商朝。
The history of using chopsticks in China dates back to the Shang Dynasty, more than 3,000 years ago.
维基词典指出，“无附加条件”这一说法的起源可以追溯到古代。
Wiktionary tells us that the origin of the expression "no strings attached" may date back to ancient times.
我们把法国南部和其他地方的洞穴壁画赞誉为杰作，它们的历史可以追溯到大概2万年前。
We hail as masterpieces the cave paintings in southern France and elsewhere, dating back some 20,000 years.
今天，我们正在见证第六次物种大灭绝，但与其它几次不同的是，目前生物多样性的丧失可以追溯到人类活动。
Today we are witnessing a sixth mass extinction, but unlike the others, the current loss of bio-diversity can be traced to human activity.
哈佛大学的一位人类学家提出，用火做饭可以追溯到近200万年前，这可以解释人类的一些特征，比如大脑大，牙齿小。
A Harvard anthropologist has proposed that using fire to cook food could be dated back to almost two million years and that it could explain hominid features like having a large brain and small teeth.
尽管它的历史可以追溯到金字塔建造后的几百年，但它的复杂程度表明，埃及人可能很长一段时间以来一直在思考飞行的想法。
Although it dates from several hundred years after the building of the pyramids, its sophistication suggests that the Egyptians might have been developing ideas of flight for a long time.
它不仅仅是一种标志，更是我们可以追溯到祖先的根源，是将我们与同族其他成员联系在一起的纽带，是大多数人希望为之而活的尊严。
Rather than merely a sign, it is the root from which we can trace back to our ancestor, the tie that helps bind us to other members of the same clan, the dignity most people hope to live for.
胸针可追溯至公元前4世纪。
他们家族的渊源可追溯到清教徒前辈移民时代。
目前，有可靠的科学证据表明，澳大利亚最早的岩石表面艺术创作可追溯到3万至5万年前。
Currently, reliable scientific evidence dates the earliest creation of art on rock surfaces in Australia to somewhere between 30,000 and 50,000 years ago.
尽管伊迪卡拉是以澳大利亚的一处地名而命名，但伊迪卡拉沉积层却遍及世界各地，并且可追溯到前寒武纪时代。
Although named after a site in Australia, the Ediacaran formation is worldwide in distribution and dates to Precambrian times.
在这个万圣节的季节里，雕刻的南瓜随处可见，但是一个可以追溯到1793年的装饰南瓜可能是所有南瓜中最神秘莫测的。
Carved pumpkins abound this Halloween season, but a decorated gourd dated to 1793 may be the spookiest of them all.
玻璃的起源可以追溯到公元前3500年，但直到2000年前的罗马帝国，吹制玻璃的艺术和玻璃的实际使用才变得更加广泛。
The origins of glass date back to 3,500 BC but it wasn't until the Roman Empire, 2,000 years ago, that the art of glass-blowing and the practical uses of glass became more widespread.
在中国，饮茶可以追溯到周朝。
Tea-drinking in China can be traced back to the Zhou Dynasty.
这种传统技艺可以追溯到明清时期。
This traditional technique dates back to the Ming and Qing dynasties.
它的历史可以追溯到2000多年前。
扬州剪纸可追溯到隋朝，距今已有2000多年的历史，扬州是最早流行剪纸的地方之一。
Yangzhou paper cutting, with a history of 2,000 years, can be dated back to the Sui Dynasty, making Yangzhou one of the places where paper cutting first became popular.
这个城堡可追溯到罗马时代。
这些规则的根基可以追溯到古代文明。
The roots of such rules can be traced back to ancient civilizations.
这座寺庙历史悠久，可追溯到初唐时期。
This temple has a long history dating back to the early period of the Tang Dynasty.
这座寺庙历史悠久，可追溯到初唐时期。
This temple has a long history dating back to the early period of the Tang Dynasty.
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