“天文”怎么读？

“天文”的英语可以翻译为：astronomy，chronometer ...

“天文”的反义词：地理。...

这四枚新邮票是为了纪念英国天文协会成立100周年而发行的。The four new stamps mark the 100th anniversary of the British Astronomical Association.在历史的年代数目和天文年代数目之间存在差别.There are differences between historical and astronomical numbering of years.数学材料是...