By the first century the making of paper in some parts of china had been well developed and had become common 到公元一世纪的时候，中国有些地方的造纸业已经很发达而且很普遍。
In the 15th century the emperor ' s emissaries sailed as far as mozambique , carrying silk and returning with a giraffe 在14世纪，皇帝的使臣远航至莫桑比克，送去的是丝绸，带回的是长颈鹿。
By the late 18th century the fish were widely popular in england and soon the goldfish bowl was seen in many homes 到18世纪晚期，在英国喂养这种金鱼已经很流行，在许多家庭都能看到金鱼碗。
They rolled their way into europe , and by the 18th century the “ migrette ” or “ quiz ” had become a favored toy of aristocrats 到了18世纪，这种外来的小玩意已成为欧洲贵族最喜爱的玩具。
Thus the open door to america - - for centuries the gateway of opportunity for countless millions - - was partially closed 这样，敞开着的进入美国的门户- -几个世纪以来对无数人的机会之门- -部分地被关闭了。
From the 16th to the 19th century the city developed parallel to the river , with the main street acting as a dyke 从16世纪至19世纪这个城市沿着河流两岸逐渐发展扩大，一些主要街道都担当着河堤的作用。
In the 15th century the emperor ' s emissaries sailed as far as mozambique , carrying silk and returning with a giraffe 远在15世纪，中国的皇帝派遣的使节最远航行到过莫桑比克，以带来的丝绸换取当地的长颈鹿。
In the 17th century the swedes repeatedly besieged it , and in the 18th century it endured the plague and two devastating fires 17世纪，遭到了瑞典人反复地的围困，并且在18世纪经受了瘟疫和两场毁灭性的火灾。
In the mid 18th century the wife of the british ambassador in constantinople described this in her letters , which were published after her death 18世纪中期，英国驻君士坦丁堡大使的夫人在信中对此做了描述。
Since 20th century the problem of financial safety causes wide attentions , peoples try to explain the crises and solve it 二十世纪九十年代以来发生的多次金融危机引起国际社会和理论界对金融安全问题的关注。
