sand dollar

sand dollar的基本解释

n.

海胆

sand dollar所属的单词分类

Animal / 动物 [799]

woolly rhinoceros  ·  woolly mammoth  ·  woolly bear caterpillar  ·  wild cat  ·  western meadowlark  ·  Umbrellabird  ·  Treefrog  ·  thresher shark  ·  Swallowtail Butterfly  ·  spiny lizard

Ocean / 海洋 [142]

moray eel  ·  marine life  ·  manta ray  ·  humpback whale  ·  giant squid  ·  euphotic zone  ·  brittle star  ·  intertidal zone  ·  mako shark  ·  orca

与sand dollar相关的网络例句 [注：此内容来源于网络，仅供参考]

Using maximum flooding surface and local explosure erosion surface as the correlation framework surface in the 4-th hierarchical base-level cycles, sand-body in the 3-th hierarchical base-level cycles formed in the 4-th hierarchical base-level cycles may be correlated layer by layer. The law of the sand-body and the characters of reservoir heterogeneity formed in the 4-th hierarchical base-level cycles are discussed. The study shows:①During early period of the 4-th hierarchical base-level cycle rising, subaqueous distributary channel formed, continuously stacked vertically, and migrated in limit range laterally, and channel sand-body stretches farther longitudinally, and lacks interbeds of mud rock and siltsand in sand rock, reservoir heterogeneity is relatively weak.②During mid-period of the 4-th hierarchical base-level cycle rising, subsaqueous distributary channel migrated actively, channel divided and converged strongly to form netted sand-body and sand sheet mainly, but interbeds of mud rock and siltsand increases gradually in sand-body, reservoir heterogeneity increased.③During later period of the 4-th hierarchical base-level rising and early period of the 4-th hierarchical base-level falling, reservoir sand-body was poor, and only form thin sand-body of subsaqueous distributary channel, subsaqeuous creveas and distal mouth bar, sand-bodys are surrounded by mud and silt rock.

进一步采用以第4层次基准面旋回中相当最大湖泛面的相转换面和具有区域性暴露侵蚀作用的层序边界面为等时地层对比框架的边界，对发育于MSC2—MSC4三个第4层次基准面旋回的第3层次基准面旋回内砂体进行了逐层等时对比，探讨第4层次等时地层对比格架内储集砂体发育分布规律，及储集砂体的非均质性特点，研究发现：①第4层次基准面上升初期发育的水下分流河道，砂体呈连续叠置、侧向迁移受限，纵向上呈长距离延伸的带状产出，砂体间泥、粉砂岩夹层少，储层非均质性相对较弱；②在第4层次基准面上升中期发育的水下分流河道侧向迁移活跃，纵向延伸过程中分流汇合作用强烈，以形成网状或席状连片砂体为主，但砂体间泥、粉砂岩夹层逐渐增多，储层非均质性增强；③第4层次基准面上升晚期和下降早期，不利于储集砂体发育，仅出现少量薄的水下分流河道、水下决口扇、远—河口砂坝砂体。

These include the euro and the US dollar, the Japanese yen and the US dollar, the US dollar and the Swiss Franc, the Australian dollar and the US dollar, the British pound and the US dollar and the US dollar and the Canadian dollar.

这些包括欧元与美元，日元和美元(154，130/美元)，美元兑瑞士法郎，以及126美元，英镑与美元、100美元和加拿大元。

It can be seen from the results that: water potential in quartz sand layer decreases with increasing thickness of the quartz sand layer under fixed sprinkling rate and increases with increasing sprinkling rate under fixed thickness of quartz sand layer; some of water above quartz sand layer flows down through the quartz sand layer and some flows down along edges of the quartz sand layer; some of water detoured the quartz sand layer flows into the region below the quartz sand layer closely along lower surface of the quartz sand layer.

实验结果表明：在喷水强度一定情况下，石英砂层中的水势随石英砂层厚度的增加而减小；在石英砂层厚度一定情况下，石英砂层中的水势随喷水强度的增加而增大；石英砂层上方的水部分通过石英砂层向下流动，部分绕过石英砂层向下流动；绕过石英砂层的水部分地紧贴石英砂层下表面向石英砂层下方的黄土中流动。

与sand dollar相关的网络解释 [注：此内容来源于网络，仅供参考]

sand dollar：沙钱

沙钱幼体感觉有掠食者出现时,就会分离克隆身体新浪科技讯 北京时间3月14日消息,据美国生活科学网站报道,海洋中生活着一种奇特的生物,当该生物幼体的周围环境发生变化预感有危险出现时,它们竟能够克隆自己的身体,这就是"沙钱"(sand dollar) 幼体的生存之道.

sand dollar：海胆

sand crack 马之裂蹄症 | sand dollar 海胆 | sand dune 沙丘

sand dollar：海胆-地上

sailboat 帆船 | sand dollar 海胆-地上 | saxophone 萨克斯管

A. asterias (Zucc.)Lem. Sea Urchin Cactus,Sand Dollar, Siliver Dollar：星球(兜丸)

星球属 Astrophytum Lem. Star Cactus | 星球(兜丸) A. asterias (Zucc.)Lem. Sea Urchin Cactus,Sand Dollar, Siliver Dollar | 瑙璃兜 cv. Nudum