单词blue-straggler
网络: 蓝离散星；蓝脱序星；蓝掉队星
But there"s still no direct evidence that shows exactly how an individual blue straggler was formed.
但是，仍然没有直接证据能够确切地说明一颗特定的蓝离散星是如何形成的。
The reason for the low abundance of unusual blue straggler stars in M13 is remains unknown.
至于M13为何拥有少量不同寻常的蓝离散星，答案还不得而知。