90GHz obs. of high-mass star-forming regions

The chemical changes of high-mass star-forming regions provide a potential method for classifying their evolutionary stages and, ultimately, ages. In this study, we search for...大质量恒星形成区（high-mass star-forming regions）的化学变化，为其演化阶段乃至最终年龄的分类提供了一种潜在方法。在本研究中，我们将搜寻……