Different ratios in the shells preserved in various layers of sediment reveal the temperature changes in the oceans during the Pleistocene epoch.
不同沉积层中保存的壳有不同的含量比例，显示出更新代海洋温度的变化。
It is based on the observation that despite various changes of pages, many important page features are preserved, such as text patterns, annotations, and hyperlinks.
它基于以下的观察：尽管页面有多种多样的变化方式，但是许多重要的页面特征在新页面都得到了保存，例如文本模式、注释信息和超级链接。
Methods: Preserved human amniotic membranes were used for transplantation for 144 patients(154 eyes) with ocular surface diseases resulted from various causes.
方法：采用保存人羊膜移植治疗各种原因造成的眼表疾患共144例（15 4眼）。
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