“天文”造句
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.
数学材料是夹在
天文著作的篇章里讲述的.
The mathematical material is presented in chapters of work on astronomy.