In a kind of starassembly line, interstellar molecular clouds collapse, producing new stars, which then gradually push back the remaining gas and dust.
类似于一条恒星生产线，星际间分子云瓦解产生新恒星，然后新的恒星逐渐将剩下的气体和尘埃推走。
2
In 1970, Marvin Gaye was Motown's top male vocal star, yet he was frustrated by the assembly-line role he played on his own hits.
In the past decade cucurbituril has become a new star molecule with emphasis on the study of host-guest molecular recognition and assembly to supramolecular structure.