查询词典 fossil ivory

In his more than half a century' s scientific and educational career, Professor Yang made significant contributions to Chinese geology and paleontology, especially in the fields of fossil brachiopods, Carboniferous biostratigraphy, paleobio-geography, and paleoecology.

杨式溥对中国西北和西南地区石炭纪的腕足动物化石的研究为中国石炭纪地层的内部界线划分、对比、化石组合、地理区系及沉积类型提供了重要证据。

The study of the Jehol Biota has a long way to go, while the scientific administration and protection of the fossil sites remains a pressing issue.

热河生物群的研究还具有很大的潜力，而对化石的科学发掘和保护的任务还十分艰巨。

In 2002, the government tightened its cultural-relics law to ban private fossil-trading, drying up both legal and black-market trade.

在2002年，政府加强完善了文化，文物法律，禁止私人化石交易和黑市交易。

Fossil big blackfish.

大黑鱼化石。

Why you poor blundering old fossil, you have had all your trouble for nothing.

你一直是在自己身体的复制品周围装神弄鬼。

Different kinds of fossil brachiopod shells have different preservation.

6地质历史时期不同类别腕足化石壳体的保存程度可能不同。

This discovery has provided a good criterion for studying the original carbon and oxygen isotopes of seawater by using the brachiopod shell fossil.

这一发现为利用腕足化石研究海水原始碳氧同位素提供了有力的判据。

Carbonate ; Oxygen isotope ; Carbon isotope ; Fossil brachiopod ; Early diagenetic cement.

碳酸盐岩；氧同位素；碳同位素；腕足化石；早期成岩胶结物

A lot of brachiopod and mollusk fossils,including 12 species of 8 genera of brachiopod,14 species of 8 genera of bivalve and 5 species of 4 genera of gasteropod,are collected from the marl and mudstone situated on the bottom of Benxi Formation in Liujiang basin.The mollusk fossils are directly preserved in the upper part or facies change bed of brachiopod fossil bed.Up to now, the materials is firstly reported,especially the mollusk.

柳江盆地本溪组底部泥灰岩及相邻泥岩中产有丰富的腕足动物、软体动物化石，经鉴定有腕足动物10属12种，双壳类8属14种和腹足类4属5种，软体动物保存于含腕足动物层的相变岩层或直接位于其上层，到目前为止，这一丰富材料尚属首次综合报道。

Different secondary layers of fossil brachiopod shells have different preservation and the way by which the shells' primary isotope ratios be influenced by diagenesis: postdepositional alternation of δ〓O、δ〓C has no effect on the low-Mg calcite minerals of the shells, while it alters the whole shell's isotopic compositions by microcrack fillings, even with the well preserved shells.

1成岩后生作用对腕足化石壳体不同结构单元的改造方式及改造程度不同：成岩后生作用对保存较好的腕足化石壳体的改造是以微裂隙充填方式进行，而对低镁方解石本身并没有影响。

We are in a good position to meet your requirements.

我们完全可以满足你方的需求。

We are all pervade d with a sense of disaster.

我们普遍有大祸降临的感觉。