Related topics: Earth sciences
Pleis·to·cene /ˈplaɪstəsiːn/ adjectiveadj HEbelonging to the period in the Earth’s history that started about two million years ago and ended about 10,000 years ago, when much of the Earth was covered with ice 更新世的〔约两百万年前至一万年前,其时地球表面多被冰层覆盖〕