By the mid-18th century, fireworks were being sold for private consumption.
到了18世纪中期，烟花已经可以供个人消费了。
By the mid-19th century most of Europe was in the first stage of the demographic transition.
到19世纪中叶，欧洲的大部分地区处于人口转变的第一阶段。
In the mid-19th century, the US government adopted a policy of Americanising Indian children by removing them from their homes and culture.
19世纪中叶，美国政府采取了一项将印第安儿童美国化的政策，即将印第安儿童赶出他们的家园并且将他们与其文化隔绝。
An ice age by mid-century would be unimaginably devastating.
到本世纪中叶，冰河时代的破坏力将难以想象。
This year's report said socialism with Chinese characteristics had entered a new era, and it drew up a two-stage development plan to build China into a "great modern socialist country" by mid-21st century.
今年的报告指出，中国特色社会主义进入了新时代，并提出分为两个阶段的发展规划，到21世纪中叶把中国建设成为“社会主义现代化强国”。
By the mid 20th century, radio and TV had become so popular that people no longer had to depend on newspapers for news.
到了20世纪中期，广播和电视已经非常普及，人们不再需要依靠报纸来获取新闻。
By the mid sixteenth century, though, sugar was becoming plentiful in England.
然而，到了16世纪中叶，英国的糖变得丰盛了。
By the mid-19th century scientists had a fair understanding of each of the three components of electromagnetism, as the phenomenon has come to be called.
到19世纪中叶的时候，科学家对被称为电磁力这一现象中三个组成部分(指电、磁和光，译者注)已经有了相当的了解。
Until the mid-19th century companies (as opposed to partnerships) were regulated by corporate charters which laid down tight rules about what they could do.
一直到19世纪中期，公司（相对于合伙企业）需遵守公司章程，章程中严格规定他们能够做什么。
In Laos, colonized by the French from the late 19th century to mid-20th century, I was overwhelmed with the bounty of bread, the smell of coffee and the fabulous wine bars in Luang Prabang.
法国对老挝的殖民统治自19世纪直至20世纪中叶结束，在琅勃拉邦，我彻底的沉浸在了丰富的面包，咖啡的醇香以及美妙的酒吧中。
By mid-century, two-thirds of the world's population will live in cities. The demands for energy, water, housing, and education will be enormous.
到本世纪中叶，世界人口的三分之二将居住在城市，对能源、水、住房和教育的需求将是巨大的。
It was built by Czar Ivan the Terrible in the mid-16th century.
它是由“恐怖的沙皇伊凡”于16世纪中叶所建。
A 2007 study by the U.S. Geological Survey found that two-thirds of the polar bears on the planet could disappear by mid-century if Arctic ice keeps melting.
美国地质调查局2007年进行的一项研究发现：如果北极地区的冰层持续融化，那么地球上三分之二的北极熊在本世纪中叶前就可能消失。
In other words, Holland's research suggests that summertime sea ice - which is predicted to disappear by mid-century - could possibly recover to its previous extent and thickness.
换句话说，霍兰德的研究表明，原本预计本世纪中期完全消失的夏季海冰有可能恢复原来的覆盖面和厚度。
Bear phases are generally preceded by great booms: the railroad mania of the mid-19th century, the Roaring Twenties, and the Internet bubble.
熊市往往起于繁荣盛世之后：19世纪中期的铁路热，咆哮的二十年代以及网络泡沫。
But the CBO has previously said that, as America ages and if current policies continue, it could theoretically hit an otherworldly 400% by mid-century.
但是，正如cbo之前所言，随着美国老龄化时代的到来，如果现行政策继续，赤字将会在本世纪中叶达到骇人听闻的400%。
But in a country that is turning Hispanic at a rapid rate (by mid-century white Anglos will be another minority), the Republicans are once again hellbent on being on the wrong side of demography.
在一个急速转变为西班牙裔的国家(到世纪中期白色盎格鲁人将会是另一个主体)，共和党人又一次不顾一切地站在了少数人的立场上。
Under current tax and spending policies it is headed towards 400% by mid-century.
在当前的税制及支出政策下，本世纪中期这一数字有望攀升至400%。
By mid-century, Russia had for years been in the stultifying grip of Tsar Nicholas I’s harsh orthodoxy.
到世纪中叶的时候，俄罗斯的沙皇尼古拉斯一世残酷的统治好几年前就已经在这里失去了效力。
A map of Atlantis - oriented with south at the top - drawn by 17th century scholar Athanasius Kircher, who pinpointed it as being in the mid-atlantic.
一张亚特兰蒂斯地图-地图上方为南-由17世纪的学者athanasiusKircher绘制，他将亚特兰蒂斯标于大西洋的中部。
By the mid-19th century, it had pushed Britain out of the Pacific Northwest and consolidated its hegemony over the Western Hemisphere.
到十九世纪中叶，它已经将不列颠人驱赶出西北部太平洋，并巩固了自己在西半球的霸权。
In 2020, nuclear power is seen at 86 gigawatts to 550 gigawatts by mid-century.
到2020年，核能排放量将会从上世纪中期的5500亿瓦特减少到860亿瓦特。
As a consequence, the mid-21st century mind might almost be infantilised, characterised by short attention spans, sensationalism, inability to empathise and a shaky sense of identity".
因此，他们到二十一世纪中叶就几乎可以说被幼儿化了，特点就是注意力不集中、情绪化、难以沟通、认同感差。
Starting at the end of the 14th century, no doubt on account of the devastation caused mid-century by the Black Death, there was a general shift towards less expensive techniques.
从十四世纪末开始，毫无疑问，当人们讲到黑死病造成对该世纪中叶丝绸工业的破坏时， 该工业有向更不昂贵的技术转变的一种总倾向。
Researchers recently estimated that the total mammal species count will rise from about 5, 500 now to 7, 500 by mid-century.
研究人员们最近估计，到本世纪中叶，哺乳类动物的物种数量将从目前的5500种上升至7500种。
Researchers recently estimated that the total mammal species count will rise from about 5,500 now to 7,500 by mid-century.
研究人员们最近估计，到本世纪中叶，哺乳类动物的物种数量将从目前的5500种上升至7500种。
Amsterdam, by mid-seventeenth century, by 1650, increases to 150,000 people.
阿姆斯特丹,到十七世纪中叶 也就是1650年,人口增长至十五万
Amsterdam, by mid-seventeenth century, by 1650, increases to 150,000 people.
阿姆斯特丹,到十七世纪中叶 也就是1650年,人口增长至十五万
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