在这一系列周期性物种灭绝事件里，白垩纪晚期恐龙和菊石的灭绝仅仅是其中一个比较严重的事件。
The late Cretaceous extinction of the dinosaurs and ammonoids was just one of the more drastic in a whole series of such recurrent extinction episodes.
伽利略是唯一的当代人物，唯一的17世纪人物，甚至在《失乐园》里也有提及。
Galileo is the only contemporary personage, the only seventeenth-century figure, even so much as mentioned in Paradise Lost.
描绘一只巨大蜘蛛吞食蜂鸟的画面，可能不太符合淑女形象，但令人惊讶的是，当梅里安在18世纪之交这样做的时候，没有人对此提出反对。
It may not have been ladylike to depict a giant spider devouring a hummingbird, but when Merian did it at the turn of the 18th century, surprisingly, nobody objected.
20世纪中期开始，孩子们就在我原来的小学里学习阅读和数数。
Children have learned to read and count at my old primary school since the mid-20th century.
在20世纪的最后几十年里，美国的生活水平提高了，经济萧条在很大程度上得以避免。
In the last few decades of the 20th century, living standards went up and economic depressions were largely averted in the US.
到19世纪下半叶，中央供暖系统已出现在每个中上层家庭里。
Central heating was present in every upper-middle-class home by the second half of the 19th century.
在17世纪，中国人把胡萝卜当药吃，但他们也吃煮在汤里的胡萝卜。
In the 1600s, people in China used carrots as medicine, but they also ate carrots boiled in soup.
既然你想确认这是不是伦勃朗的画，那么颜料里的成分就必须符合伦勃朗在世的年代——也就是在17世纪。
Since you're trying to verify if it's a Rembrandt, the ingredients in the pigment would need to have been used during Rembrandt's lifetime—in the 17th century.
但是直到15世纪，铅条也在创新设计中发挥了作用，到这时它才被放到窗户里，作为设计的一部分。
But up to the fifteenth century, the lead strips also helped create the design—they were worked into the window as part of the composition.
在19世纪50年代的头几年，阿姆斯特朗，那时还在瑞典的乌普萨拉大学里，做了一个有关氢原子的实验。
In the early years of the 1850s, Armstrong, still at uppsala university in Sweden, conducted an experiment with hydrogen atoms.
威廉·默多克在18世纪90年代受到煤炭的易得性的启发，发明了1500年里的第一种新的夜间照明方式。
The ready availability of coal inspired William Murdoch during the 1790s to develop the first new form of nighttime illumination to be discovered in a millennium and a half.
18世纪英国出现频率极高的一种肖像类型，是人们熟悉的绅士单手插在部分没有扣子的马甲里的形象。
A portrait type that appeared with relentless frequency in eighteenth-century England is the familiar image of a gentleman poised with one hand inside his partially unbuttoned waistcoat.
即使在19世纪50年代他是全国知名人物时，他也像个三流经纪行的职员，也许还会把一些可能是有标记证明的纸片挂在他的口袋外面或插在他帽子里。
Even when he was nationally famous in the 1850s he resembled a clerk in a third-rate brokerage house, with slips of paper—marked-up proofs perhaps—hanging out of his pockets or stuck in his hat.
两位考古学家都引用了12世纪的修道士蒙茅思的杰弗里曾说过的话，石头当时被认为具有医学疗效。
Both archaeologists quoted the 12th-century monk Geoffrey of Monmouth as saying the stones were thought to have medicinal properties.
继蝙蝠侠之后，21世纪最被认可的福尔摩斯替身是脾气暴躁但又才华横溢的格雷戈里·豪斯医生。
Next to Batman, the 21st century's most recognizable Sherlock Holmes replicant is the irascibly brilliant Dr. Gregory House.
思想的广泛昌明是我们这一世纪的特征，在那曙光里，英国和德国都有它们辉煌的成就。
A vast dawn of ideas is the peculiarity of our century, and in that aurora England and Germany have a magnificent radiance.
如果保持上述因素不变化，研究人员发现，在整个20世纪里，没有什么更大损失增加的倾向可以归因于风暴本身。
Holding those factors steady, the researchers found that there was no increasing trend of greater damage attributable to the storms themselves over the 20th century.
有趣的是，已经到了21世纪初，我们仍然没有在学校里展开关于如何理解男性和女性关系的教育。
It's amazing that here, at the beginning of the 21st century, we still don't teach an understanding of male and female relationships in our schools.
另外，为了满足人们的需求，我期望图书馆管理科学成为21世纪大学里最热门的学科之一。
What's more, to deal with the demand, I expect Library Science to become one of the hot subjects of university curricula of the 21st century.
今天，大多数人确实生活在一个教育普及（事实上，大学普及）的世界里，但这绝对不是18世纪的人所预想的那个世界。
Today, most human beings do live in a schooled (indeed, universitied) world, but this was definitely not the world of the 18th century.
15世纪，美第奇-里卡迪宫作为美第奇家族的官邸而修建。那时这里是真正让你眩晕的地方。它拥有的艺术作品洋洋大观，让人惊叹。
In the 15th century, when it was built as the town house of the Medici family, this was truly a place to make you pass out.
在过去的几个月里，博物馆做了大量工作——仿制14世纪的木头门，制作带有有几何图案的飞檐和首都模型。
Among their creations during months on scaffolding at the met are replicas of 14th-century wooden doors, and geometrically patterned cornices and capitals.
但是在19世纪交替之际，因为学校里每个教室有30或40个孩子，标准化就成了王道。
But at the turn of the 19th century, as schools filled up with 30 or 40 kids in a room, standardization became the norm.
在21世纪的前九年里，美国报纸的收入减少了大约50%。
During the first nine years of the 21st century, American newspaper revenues declined by roughly 50%.
摄影师聚集在布里的海滩之上，布里这座圣城以12世纪的贾格纳特寺庙而闻名于世。
Photographers gather on the beach at Puri, a pilgrimage town famous for its 12th-century Jagannath Temple.
你没必要在仅存的五个健全脑细胞从白垩纪脑袋里挤出畸形答案时发出声音，呆瓜。
You don't need to make a sound while your five good neurons crank out the next malformed sentence from your cretaceous skull, numb nuts.
你没必要在仅存的五个健全脑细胞从白垩纪脑袋里挤出畸形答案时发出声音，呆瓜。
You don't need to make a sound while your five good neurons crank out the next malformed sentence from your cretaceous skull, numb nuts.
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