Circa 1898 most international post were transported by ships.
大约在1900，大部分国际邮件经由船只传送。

Cafe Jack looks like a teenage girls dream bedroom circa 1997.
杰克咖啡屋看起来就像1997年少女梦想中的卧室。

Pharaoh Khufu began the first Giza pyramid project, circa 2548 B. C.
大约在公元前2，550年，胡夫法老开始他的首个金字塔项目。

The author of this book was said to be born circa 1080 and die in 1130.
传说该书作者约生于一零八零年，卒于一一叁零年。

Comparison of 5 Detecting Index Circa 1 Years of Voluntary Blood Donors.
无偿献血前后3年献血5项检测指标的比较

These are the basic principles of interstellar imperialism, circa 2100 A.D.
这些便是公元2100年星际帝国主义得基本原则。

The year during with Voldemort began his rise to power is given as circa 1970.
伏地魔势力的兴起的年代大约在1970年。

Circa 1977, your program was judged heavily on whether or not it was menubased.
大约在1979年，对程序的评价在很大程度上取决于是否提供菜单。

An antique sterling silver and enamel cigarette case British hallmarks circa 1900.
古董纯银和搪瓷烟盒英国标志大约1900年。

This trio of consequences can be seen to have occurred worldwide since circa 1968.
大约1970年，这三项后果遍及了全世界。

This is a very nice example of an early compass by a noted American maker, circa 1810.
这是一个在1810年左右得著名美国制造者得很好得例子。

Our modern calendar system of 12 months started with the Julian calendar circa 45 B. C.
我们现在一年分12月的做法始于约公元前45年的儒略历。

And why did economics, circa 1975, divide into opposing camps over the value of Keyness views
为什么经济学在1975年划分成反对凯恩斯价值观的阵营？

Effect of Biological Ultradian Circa 1 Hour Rhythms on Cerebral Functional Laterality in Test of Naming Pictures.
生物钟超日节律对图形命名测验一侧化效应的影响