A kind of silicified fossil wood with mixed pits on the radial tracheid wall is described.
报道了一种具混合型纹孔(互列式纹孔和对列式纹孔)的化石木.
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The age equivalence of fossils found in the sandstone and the shale is thus demonstrated.
发现于砂岩和页岩中化石的等时性就这样得到证明了.
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Floor Tongkuangyu sites are now ancient vertebrate fossils for the provincial protection units.
楼则峪遗址如今为省级古脊椎动物化石保护单位.
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Any of various plants of the genus Asperula, having whorled leaves and small funnel-shaped flowers.
化石蕨类植物的一科, 是以茎上显著呈螺旋排列的叶座为特征.
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It is a rare , well-preserved fossil tree of unusual height and girth.
这是一块树木化石,木形完整,体积又长又大,实属罕见.
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He first searched for remains of early man in Jehol, then in Thailand.
他先在热河省, 后来又在泰国寻找早期人类的化石遗存.
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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.
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As demand? and prices? rise, a scarcity of fossil fuels will bring economic restructuring.
随着需求增加和价格的上涨, 化石燃料的短缺将引发经济重组.
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那次他找到的化石比这次少得多,但也足以得出找到了新物种的结论,他把该新物种命名为南方古猿源泉种(Australopithecus sediba)。
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这块化石有一个完整的头盖骨,这是一群现代鲸鱼已经灭绝的祖先。
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2008年在南非一个洞穴内发现一个新物种化石,称做南方古猿sediba。
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属于原始人类南方古猿。达特给化石命名为非洲南猿,意即南非类人猿。
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This clam fossil is from the Cretaceous Period, approximately 100 million years ago.
这个蛤化石来自大约一亿年以前的白垩纪时期.
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Two passes ASAW technology for girth weld of LPG cylinder with lock butt joint is introduced.
本文介绍了液化石油气钢瓶环缝锁底接头、两道埋弧焊工艺.
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古生物学上这段时期是一片模糊地带,这时期的化石凌乱琐碎,很难归类是直立猿人还是南方古猿。
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