fossil ferns是什么意思

网络释义

用法例句

"Silicified" can't be called "woodened","fossil" can't be called "fossil jade"——a discuss on the name of "tree fossil jade";

“硅化”不是“树化”“化石”不能称“化玉”——对“树化玉”名词的商榷

Fossil Baboon found in Yunnan, China;

在中国云南发现狒狒化石(英文)

The fossil record and phytogeographic history of Rhizophoraceae;

红树科植物的化石记录及植物地理史

Early-Pleistocene carnivore fossils from Zhen′an,Shaanxi,China;

陕西镇安早更新世的肉食类动物化石

In this paper,according to the study of the achievments of palacontology and modern evolution,the theory about the inside indistinction in the relation of fossils and evolution.

根据现代生物进化论和古生物学成就,就化石与生物进化关系的内在模糊性予以论述。

Excavation and gathering of fossils on field are the elements in paleontologic investigation, the unearthed processes of various vertebrate fossils are recommended and then these general procedures, technical essentials, instrumentation, personnel organization and awareness proceeding of this work are expounded in this article.

化石的野外发掘和采集是古生物研究的基础,本文通过对各种类型脊椎动物化石挖掘过程的介绍,详细讲述了这项工作的一般步骤、技术要点、器材设备、人员组织以及注意事项。

The varieties, properties and applications of the series of halogenated paraffins were summarized.

综述了卤化石蜡系列阻燃剂的品种、性能和用途。

It was pointed out that the production technologies for producing brominated paraffins and bromochlorinated paraffins by bromine were a breakthrough in synthesizing halogenated paraffins.

并讨论了溴化石蜡的几种溴化反应方法,即烯烃法、N-溴代丁二酰亚胺法和氧化汞催化法,指出溴素法生产溴化及溴氯化石蜡是卤化石蜡合成工艺的突破。

Indirect determination of chlorine in chlorinated paraffin by flame atomic absorption spectrometry;

火焰原子吸收光谱法间接测定氯化石蜡中氯

Study on the composite stabilizer of chlorinated paraffin;

氯化石蜡高效复合稳定剂的研究

Summary of capacity expansion of 4000t/a chlorinated paraffin;

4000t/a氯化石蜡扩能总结