In 1951, a group of mammal fossils (or fossils of human bones) were found in Yushu City of Changchun area.

1951年，在长春地区的榆树市发现了哺乳动物(或者说是人骨化石)化石。

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By fossils, we mean traces of prehistoric animals such as bones, which become mineralized, or impressions of bones or organs that are left in stone.

我们所说的化石，指的是史前动物的遗迹，如已矿化的骨头，或留在石头上的骨头或器官的印痕。

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The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.

在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。

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So we have only their bones, or fossils,to study.

VOA: special.2010.06.04

Fossils are plants or parts of animals that have been saved in rocks for millions of years.

VOA: special.2009.05.13

It relies on proxy measurements taken from things like marine fossils or ice cores that offer a physical record of past temperature.

WSJ: Earth Hotter Now Than Most of Past 11,000 Years

It relies on proxy measurements taken from things such as marine fossils or ice cores that offer a physical record of past temperature.

WSJ: In Study, Past Decade Ranks Among Hottest

His approach relies on a statistical technique invented in 1943 by a British statistician, Ronald Fisher, and now widely used by geologists and ecologists to estimate the diversity of populations (of, say, fossils or beetles).

ECONOMIST: Statistics