查询词典 bivalve

Algae, echinoderm, bivalve, and reef-building organisms including bryozoan, coral, stromatoporoids, and sponge are conserved in the carbonate of the Yijianfang Formation.

通过对塔河南盐下地区28口钻井岩心中奥陶统一间房组的详细描述和3 200余块薄片的鉴定，确认其主要的岩石类型有生屑灰岩、生物灰岩、藻球粒灰岩、含核形石灰岩、鲕粒灰岩、内碎屑灰岩、微晶灰岩、海绿石灰岩。

Freshwater clam Corbicula fluminea is the most important freshwater bivalve in Taiwan.

台湾蚬的养殖在台湾为所有二枚贝类中产量第三名，也是淡水贝类中产量第一名。

Corbicula fluminea, a bivalve commonly distributing in the tidal flats of the Yangtze River estuary, was selected for this study, which aimed to analyze accumulation characteristics of Zn,Cu,Pb,Cd and Cr in C. fluminea and to evaluate current situation of its biological quality.

以长江河口湿地生态系统一种习见的大型底栖动物河蚬Corbicula fluminea为研究对象，分析和评价了河蚬对Zn、Cu、Pb、Cd和Cr的积累特性以及长江口区河蚬的生物质量现状。

Keywords Heavy metal;toxicity;bivalve;crustacea;dredged material

重金属；毒性；双壳类；甲壳类；疏浚物

The FTIR spectra of aragonites from different origins, which include aragonites from nacreous layers of pearls and bivalve shells, coral skeletons and natural inorganic aragonites, are measured and comparatively analyzed.

对3种类型的文石即珍珠和贝壳珍珠层、珊瑚及天然无机文石的FTIR光谱进行了测量和对比分析。

Since their origin in the Early Cambrian, the bivalve molluscs have evolved a remarkable variety of forms that reflect their diverse habits through the Phanerozoic Eon.

由于他们在早寒武世的双壳类软体动物已形成了显着的各种形式，反映了显生宙通过各自不同的习惯起源。

But once they grow to adulthood, these largest of bivalve mollusks permanently affix themselves to surfaces such as sand or coral reef rubble.

但是成长为成年期，这些最大的双壳类软体动物将会不变的黏附于它们自己的表面就像是沙滩或珊瑚虫暗礁碎石。

At the mixed nutrition stage larvae lived on nutriment from yolk sac and oil globules, in addition to feeding on particulate organic detritus containing Tintinnopsis spp., also on few of trochophore and veliger of bivalve and trochophore of Polychaeta in water of the earthen ponds.

混合营养期仔鱼除依靠吸收卵黄囊和油球为营养以外，还从土池水体中摄食含有拟铃虫的颗粒有机碎屑以及少量的双壳类担轮幼体、面盘幼体和多毛类担轮幼体。

The results showed that the juvenile A. sinensis mainly fed on demersal fish, polychaeta and amphipoda, as well as some small-sized benthic invertebrates including shrimp, crab and bivalve.

结果表明：长江口中华鲟幼鱼以底栖小型鱼类、多毛类和端足类为主要食物，兼食虾类、蟹类及瓣鳃类等小型底栖动物。

Any of several freshwater bivalve mollusks of the genera Anodonta and Unio, found in the central United States, that burrow in the sand or mud of lakes and streams.

淡水蚌发现于美国中部的无齿贝属和珠蚌属几种淡水双壳软体动物的一种，在湖和河中的沙中或泥中挖洞

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。