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.
河源区的冰期可划
为3期，即末次冰期、倒
第二次冰期、倒第三次冰期，末次冰期又可为2个冰阶。
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.
河源区的冰期可划为3期，即末次冰期、倒第二次冰期、倒第三次冰期，末次冰期又可为2个冰阶。
声明：以上例
、词性
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