Thee next step will be to point to a single piece of the geological record (an ice core, perhaps, or samples from lake sediments) that can serve as the officially accepted reference point.
下一步的焦点就是一条地质记录（关于冰核，又或许仅仅是湖泊沉积物）。它是官方所能接受的参考数据。
Thee next step will be to point to a single piece of the geological record (an ice core, perhaps, or samples from lake sediments) that can serve as the officially accepted reference point.
下一步的焦点就是一条地质记录（关于冰核，又或许仅仅是湖泊沉积物）。它是官方所能接受的参考数据。
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