在17世纪中叶的伦敦，科学家们普遍不信任烟花。
In London in the middle of the 17th century there was general distrust of fireworks among scientists.
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。
By the mid-19th century most of Europe was in the first stage of the demographic transition.
19世纪中叶，进化论者查尔斯·达尔文首次对食肉植物感到惊奇。
Evolutionist Charles Darwin first marvelled at flesh — eating plants in the mid-19th century.
贝拉·巴托克是匈牙利人，他的一生从19世纪末延续到20世纪中叶。
Béla Bartók was a Hungarian, whose life stretched from the late nineteenth century to the middle of twentieth century.
由于题材过于个人化，二十世纪中叶几位著名诗人的作品被称为“自白”诗。
Because the subject matter was so personal, the work of several prominent mid-twentieth century poets has been termed "confessional" poetry.
在这个世纪中叶，一位安特卫普的金融家略微夸张地说道：“没有汇票就不能交易，正如没有水就不能航行一样。”
At mid-century, an Antwerp financier only slightly exaggerated when he claimed, "One can no more trade without bills of an exchange than sail without water."
19世纪中叶标志着俄国历史的转折点。
The middle decades of the 19th century marked a watershed in Russia's history.
在19世纪中叶，多罗西娅·迪克斯发起了为精神病患者争取人道待遇的运动。
In the mid-nineteenth century, Dorothea Dix began to campaign for humane treatment of the mentally ill.
到了20世纪中叶，“边疆假设”在历史学家中渐渐失宠。
By the middle of the twentieth century, the Frontier Thesis fell into disfavor among historians.
在19世纪中叶，摄影术的发明极大地改变了人们对可见世界的感知。
Perceptions of the visible world were greatly altered by the invention of photography in the middle of the nineteenth century.
到了16世纪中叶，金融家和商人普遍接受汇票来代替黄金或白银进行商品交换。
By the middle of the sixteenth century, financiers and traders commonly accepted bills of exchange in place of gold or silver for other goods.
在19世纪中叶，由于工业化的发展，德国和其他欧洲国家经历了前所未有的大量因工死亡和因工事故。
During the middle of the 19th century, Germany, along with other European nations, experienced an unprecedented rash of workplace deaths and accidents as a result of growing industrialization.
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”。
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.
然而，到了16世纪中叶，英国的糖变得丰盛了。
By the mid sixteenth century, though, sugar was becoming plentiful in England.
预计本世纪中叶竣工的工程包含三条浩瀚的人工运河。
Due for completion in the middle of the century, it involves the construction of three vast channels.
它们关闭了光合作用，减少了树叶中叶绿素的产量。
Photosynthesis shuts down, halting the production of chlorophyll in leaves.
19世纪中叶的富兰克林远征充分体现了这个理念，博伊德说。
The Franklin Expedition in the mid-1800s exemplifies this concept well, Boyd says.
在20世纪中叶，美国约有一半的视障学龄学生读盲文。
During the middle of the 20th century, about half of visually impaired school-age students in America read Braille.
墨西哥禁止神职人员干政的历史可以追溯到19世纪中叶。
Mexico has a long history of anticlericalism, going back to laws in the mid-19th century.
英国十八世纪中叶第一次出现了演出非戏剧类作品的建筑。
In England in the middle of the eighteenth century, buildings first were built for the performance of nontheatrical musical works.
但是为了达到这一目标，将需要在本世纪中叶大幅度削减80%排放量。
But reaching that would require a drastic 80 percent cut in emissions by midcentury.
禁止吸烟一点也不新鲜：一些德国，意大利和美国国家曾在19世纪中叶做过。
Nor are smoking bans new: some German, Italian and American states had them in the mid-19th century.
有关索引的统计信息，比如索引级别的数量和每个索引中叶子页的数量。
Statistics about the index such as the number of index levels and the number of leaf pages in each index.
在二十世纪中叶，全世界人口增长的速度远远地高于粮食产量的增长速度。
In the middle of the twentieth century, world population was expanding faster than food production.
可以预见，到本世纪中叶，海洋酸化的腐蚀性将强到足可溶解甲壳类动物。
The acidification of the oceans is already predicted tohave such a corrosive effect that unprotected shellfish will dissolve by themiddle of the century.
到了二十一世纪中叶，美国画家和雕塑家开始在 世界 范围内对艺术产生重大影响。
By the middle of the twentieth century, painters andsculptors in the United States had begun to exert a great worldwideinfluence over art.
在18世纪直到19世纪中叶，鲸油一直都是多数西方世界国家的照明能源。
From the 18th through the mid-19th century, whale oil provided light to much of the Western world.
在18世纪直到19世纪中叶，鲸油一直都是多数西方世界国家的照明能源。
From the 18th through the mid-19th century, whale oil provided light to much of the Western world.
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