例句與造句

1. First occurrence of acanthodian microfossils from the early devonian of lijiang , yunnan , china
   泥盆世棘魚類微體化石的首次報道
2. The hard coats of spores and pollen grains are preserved better , forming microfossils
   孢子和花粉粒的堅硬外殼被完好保留下來形成微化石。
3. Our oldest fossils date to roughly 3 . 5 billion years ago , and consist of bacteria microfossils
   我們的最舊的化石約會對大致3 . 5十億年前,和包括細菌microfossils 。
4. In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us
   2003年夏天，我們開始瞄準一種微化石的類型，其復雜的形態(tài)特徵特別引起我們興趣。
5. Our initial probes suggested that a relatively thin sedimentary layer , which is black in color , would be the most promising for finding a variety of microfossils
   我們的初步探查顯示，有一層黑而薄的沉積，最有希望找到各式各樣的微化石。
6. It's difficult to find microfossil in a sentence. 用microfossil造句挺難的
7. We know from microfossil evidence that living cells existed on earth some 3 . 5 billion years ago , and these bear a striking resemblance to microorganisms we find today in geothermal springs
   從微體化石的證據(jù)顯示，細胞早于約3 . 5億年前便已存在，它們竟和現(xiàn)時在溫泉中發(fā)現(xiàn)的微生物十分類似。
8. Well - preserved autofluorescence properties show a correlation between acritarchs morphology and the intensity of organic cell walls and two groups of microfossils are distinguished
   這也是我國首次用化石藻類熒光與生物屬性關(guān)系進行研究的嘗試，為今后利用熒光進行化石藻類分選和超微結(jié)構(gòu)研究作了有益的探索。
9. The latest studies show that these rocks are older than the ediacara biota , most likely 580 million to 600 million years old , and thus that the microfossils they contain lived 40 million to 55 million years before the cambrian
   最新研究顯示，此沉積比艾迪卡拉生物群還早，很有可能介于6億到5億8000萬年前，也就是說，里面微化石的生存年代比寒武紀還早了4000萬到5500萬年左右。
10. The origin and evolution of land plants was an important event in the history of earth life and has affected all other lives on the earth and global environment . during the past two decade , the new discoveries of fossil plants microfossils and megafossils from the mid - ordovician through all silurian to the lower devonian improved knowledge of the origin of land plants , provided a time framework of the basal groups for the land plants and the early evolution diversity of vascular plants . three new plant based epochs have been recognized . on the other hand , molecular sequence studies have provided insights into the phylogeny and early branches of land plants . a phylogenetic tree has been established by the joint of a study of comparative morphology and gene sequences . this paper summarizes recent advances and new knowledges , comments on the phylogenetic studies based on the cladistic analysis
    陸生植物的起源和演化是地球生命中的重大事件，它影響到地球上所有的其他生命和全球環(huán)境。在過去的20年中，從中奧陶世歷經(jīng)整個志留紀至早泥盆世的巖層中，化石植物微化石和大化石的新發(fā)現(xiàn)改變了人們對陸生植物起源的認識，并且為陸生植物和維管植物早期演化分異提供了基部類群分化的時間框架。據(jù)此人們識別出地史中的3個陸生植物的時代：始胚植物時代始維管植物時代和真維管植物時代。