fossils中文什么意思

例句与用法

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1. scientists have dated the fossils by their bone structure .
   科学家根据那些化石的骨骼结构确定其年代。
2. at this distance of time it is difficult to date the fossil .
   时间隔得这么久了，很难确定这化石的年代。
3. tow factors are favorable for the preservation of organisms as fossils .
   有两个因素对生物化石的保存是有利的。
4. sedimentary rocks are thus tagged by the fossils which they contain .
   沉积岩就这样以它们所含的化石作为鉴别的标记。
5. two others of these trilobite fossils have been found in the same area .
   在同一地区还发现了另外两块这些三叶虫化石。