查询词典 bivalves

After consulting relevant materials, 58 endemic species of Chinese freshwater bivalves belonging to 17 genera in 2 families were systematically sorted out, most of which belong to the family Unionidae (57 species, 16 genera).

通过查阅有关文献整理得出，中国淡水双壳类特有种计有58种，隶属于双壳纲2科17属，其中主要是蚌科的种类（16属57种）。

Usually the major fouling groups are bivalves and acorn barnacles.

污损生物是影响海洋设施安全与使用寿命的重要因素之一。

The results show that the biodeposition rates of bivalves change seasonally.

02年5月—03年9月对桑沟湾养殖主要经济双壳贝类的生物沉积作用进行了研究。

The mantle cavity is lateral and in most bivalves, the gills have a respiratory and digestive function.

双壳贝的外壳是由外套膜分泌而来，套膜包覆著内脏，在多数双壳贝中，外套腔多位於两侧，鳃具有呼吸和消化的功能。

BIVALVES :The oil spill from the Prestige has seriously affected fish landings in Galicia.

双壳贝类：威望号油轮的污染严重影响了在加利西尔上岸的鱼。

In addition, 3 outcrops in the Chiahsien area were involved into this study, which including Ssutehsiang, Paiyunhsiangku, and Niupu. Purposes of this fieldwork have two folds. One is to compare the specific occurrences of carbonate-cemented mudstones in TKS, HKS, PPS, FS, and those in the Chiahsien area. The other is to recheck Hayasaka's descriptions (1932) about the unique occurrences of fossil lucinids bivalves and fossiliferous marls of Chiahsien and the southeastern Shoushan.

此外，选定甲仙地区四德巷、白云仙谷以及牛埔等三个剖面，以做为与在大岗山、小岗山、半屏山以及凤山等地基底泥岩中所见特殊碳酸盐胶结泥岩产状的比较，同时也藉此验证Hayasaka（1932）关於甲仙四德巷与寿山东南侧矿场泥岩顶部地层中，所含泥灰岩与大量巨带蛤化石的记载。

Unlike other molluscs, bivalves lack a radula and feature labial palps, which carry food from the gills to the mouth.

与其他软体动物不同的是，双壳贝缺乏齿舌，具有唇瓣，可将食物由鳃送到口部。

The compactness and association of large lucinid bivalves in massive cold-seep carbonates further indicate pronounced, long-lasting seepage of methane occurred antecedently the development of Takangshan Reef.

至於大岗山地区所见岩理致密并且含有许多大型满月蛤贝类的块状冷泉碳酸盐岩，则显示在大岗山珊瑚礁发育之前泥岩基底曾有持续相当长时间甲烷逸出的冷泉作用。

For research of bivalve's effect on marine plankton community structure, we conducted Aug.—Dec. 1996 experiment to study the two bivalves' feeding selectivity and their filter－feeding rates. For observing the feeding selectivity, Chlorella sp., Chaetoceros muelleri, Lermmerman, Nitzschia closterium and Pyramidomonas sp.

于1996年8—12月，分别从青岛海洋大学太平角实验基地和胶南市水产养殖研究所采集海湾扇贝和太平洋牡蛎，采用室内实验的方法，比较研究了不同规格的两种贝类对4种不同大小藻类的选择性及水温对其滤除率的影响。

Relationship between DNA content and evolutionary degree DNA contents of bivalves were analyzed statistically with SPSS software at subclass, order, family and species grade respectively. Significant difference was detected between mean values of two subclasses according to the result of T-test. The DNA content of Heterodonta (3.77pg) was distinctly larger than that of Pteriomorphia (3.14pg). It was concluded based on ANOVA that the general trend of DNA content was to change from lower to higher values associated with evolution at higher taxonomical classification, i.e.

核DNA含量与进化地位的关系运用SPSS统计软件，在亚纲、目、科以及种4个分类等级上对双壳贝类的核DNA含量进行了统计分析。T检验结果显示，两亚纲核DNA含量的平均值有明显差异，异齿亚纲的核DNA含量平均值(3.77pg)显著大于翼形亚纲(3.14pg)，该结果表明，核DNA含量在较高的分类等级，即亚纲上表现出随着进化地位的升高显著增大的趋势。

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。