That book forms a companion to the present volume.
那本书与现有的一册成为姐妹篇。
The material drawn tidally from the large dying star thus forms a tail that chases the denser companion star from behind.
于是，从大的垂死恒星如潮汐般涌出的物质，便形成了一条尾巴，紧追在致密伴星之后。
That book forms a companion to the present volume.
那本书与现有的一册成为姊妹篇。
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