Yet there were no aircraft in 300 B.C..
然而在公元前300年没有飞机。
There were no aircraft in 300 B.C., when it is judged the designs were made.
公元前300年还没有飞机，人们判断那时候飞机的设计就已经完成了。
For example, Aristotle once had a research library in the third century B.C..
例如，亚里斯多德在公元前三世纪曾有一个研究型图书馆。
It was made around 150 B.C., then lost in a shipwreck.
它大约在公元150年制造，然后在海难中遗失。
那是大约公元前400年。
The wall finally took shape in the the third century B.C.
并于公元前三世纪成型。
Iran has a civilization that dates back to 4,000 B.C..
伊朗文明可追溯至公元前四千年。
Construction of the wall began in the fifth century B.C..
长城最早始建于公元前五世纪。
It is said that it was sculpted around the second century B.C..
它据说是作于公元前2世纪左右。
Umbrellas are very old. The Chinese had them in the eleventh century B.C..
伞有着悠久的历史，中国人在公元前11世纪就发明了它，随后又传到了印度、波斯和埃及。
David, for example, is a historical figure. He did live in the tenth century B.C..
例如大卫就是一个历史人物，他的确生活在公元前10世纪。
BCE stands for "before common era," and is equivalent to B.C., or before Christ.
BCE代表了公元前(beforecommonera)，它也相当于b.c .或基督诞生前(before Christ)。
Construction took place over hundreds of years, beginning in the seventh century B.C..
修建始于公元前7世纪，历经数百年之久。
Construction took place over hundreds of years, beginning in the seventh century B.C..
修建始于公元前7世纪，历经数百年之久。
应用推荐