The last glacial period is divided into two stadial stages with an interstadial stage.Evolution of lakes of the source area during the Quaternary went through three stages.
黄河源区的冰期可划分为3期，即末
冰期、倒数第二冰期、倒数第三冰期，末冰期又可分为2个冰阶。
冰段(的)The last glacial period is divided into two stadial stages with an interstadial stage.Evolution of lakes of the source area during the Quaternary went through three stages.
黄河源区的冰期可划分为3期，即末冰期、倒数第二冰期、倒数第三冰期，末冰期又可分为2个冰阶。
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