我们有过暖期和小冰期；但是变化很小。
We have had warm periods and little ice ages; but the changes have been small.
最暖期不是在中全新世，而是在晚全新世。
The warmest stage was not in Middle Holocene but in Late Holocene.
从偏冷期到偏暖期，整个热带对流层顶显著变暖。
The whole tropical tropopause has been warmed up from cold period to warm period.
从偏冷期到偏暖期，整个热带对流层顶显著变暖。
The whole tropical tropopause has been warmed up from cold period to warm period.
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