cragmartincanbeconfusedwiththethreeotherspeciesinitsgenus,butislargerthanboth,withbrightertailspotsanddifferentplumagetone.
Thisbirdiscloselyrelatedtotheotherthreecragmartinswhichshareitsgenus,andhassometimesbeenconsideredtobethesamespeciesasoneorboth,althoughitappearsthatthereareareaswheretwospeciesrangesoverlapwithouthybridisationoccurring.
这两个句子中提到的都是“the three other species”，为何会用Both指代？Both可以指带3个事物吗？还是句中both的使用方法错误？
假如使用方法正确，第二句的“hassometimesbeenconsideredtobethesamespeciesasoneorboth”应该怎么样理解？
期望解答，谢谢！
不需要剖析了。这篇文章的作者的母语应该不是英语。both的用法百分之百是不对的。
