circa

prep.

大约于；

adv.

大约；近似；

1. She was born circa 1060 and died in 1118.
   她约生于一零六零年，卒于一一一八年。
2. In summer, circa 1470 BC, Santorini exploded.
   大约在公元前1470年夏天，圣多里尼火山爆发了。
3. Pharaoh Khufu began the first Giza pyramid project, circa 2550 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。

CIRCA: a cooperative intelligent real-time control architecture
CIRCA: the Cooperative Intelligent Real-time Control Architecture
Globin gene regulation and switching: circa 1990
Status of three-neutrino oscillation parameters, circa 2013
Sleep research in affective illness: State of the art circa 1987.
Stuttering: a review of research findings and theories circa 1982
Gene duplication and the uniqueness of vertebrate genomes circa 1970-1999.
A regime shift in the North Sea circa 1988 linked to changes in the North Sea horse mackerel fishery
A comprehensive change detection method for updating the National Land Cover Database to circa 2011
Indirect projections from the suprachiasmatic nucleus to major arousal-promoting cell groups in rat: implications for the circadian ...