Zoo benthos species were observed,with 7 species of arthropod, species of mollusk,and species of annelid.

采集到底棲動物種操逼免费a级视频，其中節(jié)肢動物7種久久亚洲精品女人黄，軟體動物種，環(huán)節(jié)動物種精品黄色网站一级。

Clams as well as many other species of mollusk produce aragonite first and then transform the crystal to calcite.

我們要研究的文蛤及大部分的軟體動物會先制造霰石www.日韩三级在线，再將霰石轉(zhuǎn)成方解石結(jié)晶。

A similar structure or part, such as one that enables the valves of a bivalve mollusk to open and close .

類似鉸鏈的裝置類似的結(jié)構(gòu)或部分日韩校园激情无码视频，如使雙殼類軟體動物的殼張開閉合的關(guān)節(jié)

Bivalve mollusk abundant in rivers of central United States.

盛產(chǎn)于美國中部河流的雙殼類軟體動物日韩老司机免费午夜电影院。

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.

柳江盆地本溪組底部泥灰?guī)r及相鄰泥巖中產(chǎn)有豐富的腕足動物黑人大战白妞在线无码、軟體動物化石，經(jīng)鑒定有腕足動物10屬12種东北妓女东北话对白，雙殼類8屬14種和腹足類4屬5種久久精品无码一级二级，軟體動物保存于含腕足動物層的相變巖層或直接位于其上層，到目前為止成人免费国产剧情视频在线播放，這一豐富材料尚屬首次綜合報道www.birugy.com。

The chemical structure of calcite in many mollusk shells bonds strongly to amino acids.

許多軟體動物的殼中，方解石的化學(xué)結(jié)構(gòu)與胺基酸形成強固的鍵結(jié)久爱www人成视频在线观看免费。

Cephalopod belongs to an important economic mollusk and also plays an important role in the marine ecological system.

頭足類不僅是重要的經(jīng)濟軟體動物国产醉酒迷奷系列在线图片，同時在海洋生態(tài)系中扮演著重要的角色。

Any of various cephalopod mollusk s of the order Octopoda,such as an octopus,having eight tentacles.

有八個附肢的個體任何一種八腕目的頭足綱的軟體動物一a黄视频，如章魚久久婷婷一级婬片A片AAA野外，有八個觸腳

The results show that the benthons were not polluted by the heavy metals, but the concentrations of Pb and Cd in crustacea and mollusk were potentially serious. The contents of Cd in crustacea was beyond the Standard Indexes of the seafood. The contents of Cd in mollusk was same as Stan...

結(jié)果表明，底棲生物中Hg久久综合视频网站、Pb一级人射、Cd、As含量較低天天躁夜夜躁狠狠躁图片swag，但甲殼動物和軟體動物體內(nèi)Pb和Cd具有潛在的嚴(yán)重積累問題三级午夜理伦三级小视频；甲殼類Cd含量已嚴(yán)重超人體消費標(biāo)準(zhǔn)，軟體類的Cd含量等于人體消費標(biāo)準(zhǔn)值亚洲图片欧美激情卡通动画，甲殼動物和軟體動物的可食性應(yīng)引起人們的關(guān)注天天av天天。

Any of various marine gastropod mollusk s, chiefly of the genus Urosalpinx, that bore holes into the shells of bivalve mollusk s.

海洋腹足綱軟體動物，主要指在雙殼類軟體動物的貝殼上鉆孔的骨螺屬成年免费午夜福利。