But the newfound star pair is unique in that they don't swap matter as they spin, providing a "clean clock" to measure the effects of gravitational waves, Brown said.

但是这对新发现的双星非常独特，因为它们在旋转时没有发生物质交换，这就好像为我们提供了一台“准确的时钟”，使我们可以对引力波的效果进行测量，布朗说道。