By employing the characterization methods of X-ray and DSC, this paper conducts a research on films of different stretch ratio.

通过X—射线、DSC等表征手段，我们对不同拉伸程度的薄膜进行了研究。

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Previous attempts to quantify black holes' spins have attempted to analyse these X-rays - accounting for the violent processes within that can stretch and distort the X-rays' energies.

BBC: First glimpse of a black hole's spin