变星的一种，它的固有光度和它的光变周期有着紧密的联系。

A type of variable star whose period of variation is tightly related to its intrinsic luminosity.

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变星的一种，它的固有光度和它的光变周期有着紧密的联系。

A type of variable star whose period of variation is tightly related to its intrinsic luminosity.

youdao