例句與造句

1. In recent decades , with rapid development in space science and computer technologies , astronomers discovered many new and exotic celestial objects . some celestial objects like supernova 1987a can help to reinforce the theory of stellar evolution . but others such as gamma ray sources pose more headaches and sometimes conflicting theories
   近年來，由于太空科技及電腦技術(shù)的迅速發(fā)展，天文學(xué)家發(fā)現(xiàn)了很多以往從未見過的新天體，有些天體例如超新星1987a能令恒星理論基礎(chǔ)更加鞏固，但亦有一些奇異天體例如伽瑪射線源卻令天文學(xué)家感到束手無策。
2. It's difficult to find theory of stellar evolution in a sentence. 用theory of stellar evolution造句挺難的