表面化学揭示哪些大质量星通过双星伴星获得了质量

大多数恒星（包括大质量星）都存在于双星系统中，天文学家认为其中约70%曾从伴星获取质量。研究人员现已找到一种确定哪些恒星经历过此类质量转移的方法。

Most stars, including massive ones, are in binary pairs. Astronomers think that about 70% of them have gained mass from their companions, but there's been no way to determine which ones have done so. Now, researchers have found a way.