格林兰单冰核心累集记录说明什么？
What do accumulation records of single ice cores in Greenland represent?
研究人员将他们的研究基于冰河时期陆地与海洋的表面温度，通过检查冰核心，钻井，海底沉积物和其他因素。
The researchers based their study on ice age land and ocean surface temperature obtained by examining ices cores, bore holes, seafloor sediments and other factors.
水分子连接成坚固的结构排布，这一小小的冰结构是雪花晶体的核心。
Water molecules join together in a rigid pattern - a tiny ice structure that's the heart of a snow crystal.
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