1·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.
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。
2·The earliest ceramics were fired to earthenware temperatures, but as early as the fifteenth century B.C., high-temperature stonewares were being made with glazed surfaces.
最早的陶瓷制品是在制陶的温度下烧制的，但是早在公元前15世纪，（人们）已经用高温烧制表面上釉的炻器。
3·The number of extant manuscripts, however few, really does not allow scholars to infer how many ancient Latin manuscripts of a work survived to the ninth, the twelfth, or even the fifteenth century.
现存的手稿，不论数量多么少，也不能让学者推断一部作品的古代拉丁手稿有多少存活到了九、十二，甚至是十五世纪。
4·The fifteenth century saw big progress in printing technology in the west.
15世纪西方印刷术有了很大进步。
5·The Portuguese Vasco da Gama's Voyage around southern Africa to India took place at the end of the fifteenth century, and by 1502 the trans-Abrabian caravan route had been cut off by political unrest.
葡萄牙人瓦斯科·达·伽马在15世纪末环绕南非航行至印度，而到1502年的时候跨阿巴拉比的商队路线因政治动乱而被切断。
6·The palace was built in the fifteenth century.
这宫殿建于十五世纪。
7·How many fifteenth century Milanese artists can you name?
有多少15世纪的米兰艺术家你能叫出他们的名字？
8·Something was happening in Florence in the fifteenth century.
在15世纪的佛罗伦萨一定有什么事情发生。
9·Incidentally, I'm not saying that good art = fifteenth century European art.
顺带提一句，我并不是说只有十五世纪的欧洲艺术才是好艺术。
10·It was named after Amerigo vespucci who landed in America in the late fifteenth century.
它是以在十五世纪末登陆美洲的亚美利哥？维斯浦奇的名字命名的。