例如，海星捕食各种双壳类软体动物，防止这些双壳类动物独占海底的栖息地。
For example, sea stars prey on a variety of bivalve mollusks and prevent these bivalves from monopolizing habitats on the sea floor.
稍有心脏状掘沙的双壳类软体动物。
最主要的生物因素是双壳动物幼虫类型。
可食用的普通欧洲双壳贝。
概要介绍了A BB开发的深炉壳双壳直流电弧炉。
The d. C. double-shell electric arc furnace developed by ABB is presented.
各种设计包括单壳，双壳，坚固型，带涂层和电热辊。
These designs include single shell, double shell, solid, coated and electrically heated rolls.
不过，协定没有涉及到双壳贝类、水产品卫生和检疫问题。
However, it does not include trade of bivalves, fish health and quarantine issues.
加氢装置用双壳程换热器分为法兰式和螺纹锁紧环式两种。
The double shell side heat exchanger for use in hydrogenated unit is divided into two kinds of flange type and thread lock ring type.
同时，提出了这类双壳大舱口船舶扭转强度的理论计算方法。
Moreover, the paper presents a relatively simple and comprehensive theoretical method for torsional strength calculation.
本文从双壳驳模型结构设计、扭转试验技术两方面作了系统介绍。
Structural design of double skin barge models and techniques for torsion experiment of these models are described.
以陶二煤矿新南总巷道支护为例，验证了连续双壳支护的合理性。
The example of the new-southern roadway support of Tao-er coal mine proved the reasonability of continuous double - shell's support.
本文重点介绍了双壳程换热器的结构、制造特点和使用注意事项。
The structure, manufacture feature and matters needing attention in operation of double shell side heat exchanger a...
变态过程是双壳贝类由幼虫向成体转变的一个必不缺少的发育阶段。
Metamorphosis is an important stage from larva to juvenile in bivalvia.
调查期间采到的软体动物已鉴定52种，其中腹足类45种，双壳类7种。
Among 52 species of mollusca identified, 45 were gastropods, 7 were bivalves.
该双壳化石组合的发现对歪古村组沉积时期双壳动物群的面貌是一个补充。
The discovery of bivalve fossil assemblages supplied the feature of bivalve fauna during the deposition of the Waigucun Formation.
许多蛤类利用双壳及内部柔软强健足部的交替运动在河床上掘洞来逃避天敌。
Many types of clam escape predators by burrowing into the sea bed using alternating movements of their shell and of the soft, muscular foot contained within that shell.
采用本发明可以于海区现场精确得浅水区潮间带双壳贝类的生物沉积作用。
The field measuring method and a field measuring method can accurately obtain the deposition action of bivalve living creatures in shallow water area intertidal zone in a sea area field.
这些美味的双壳贝类生物以清除水中过量的浮游植物闻名于世，它们把营养变成肉和贝壳。
The tasty bivalves are known for removing excess phytoplankton from water and sequestering nutrients in their shells and flesh.
此外，双壳油轮并不需要纵向强度纵向舱壁，作为内部船体已经提供了这种。
Furthermore, a double-hulled tanker does not need longitudinal bulkheads for longitudinal strength, as the inner hull already provides this.
当它们附在蛤蜊上时，象上面插图显示的那样，它们会妨碍这些双壳类生物打开。
When they attach to clams, as shown above, they prevent these bivalves from opening.
就越南沿海双壳纲软体动物分类区系而论，应属印度—西太平洋区的印尼—马来亚区。
Considering classification of Bivalvia fauna of Vietnam coast, the fauna should belong to the Indo-Malayan subregion under the Indo-west Pacific region.
我公司的热蜡辊涂机基于了CM-203设计平台，将双壳铬涂抹辊与加热供应面板结合。
The CMS Hot Wax roll coater is based on the CM-203 design platform which incorporates a double shelled chrome applicator roll and heated supply pan.
加之MARPOL12A条款要求对燃油舱设置双壳保护，给机舱的结构设计增加了难度。
Additional, in "MARPOL Reg 12a" the demand of Double Hull Protection for fuel oil tank, increases the difficulty of structure design for engine room.
此外，双壳散货船对节约在港卸货时间和货舱清理时间以及货舱维护费用等同样有着显著的优势。
In addition, the double hull bulk carrier has the remarkable superiority on saving the time of unloading cargo in the port and the cargo hold cleaning up as well as the cargo hold maintenance cost.
双底双壳，或已在所有的客运船舶所需的几十年的一部分海上人命安全公约或国际海上人命安全。
Double hulls or double bottoms have been required in all passenger ships for decades as part of the Safety of Life At Sea or SOLAS Convention.
将梁函数组合法应用到求解双壳系统的固有特性，得到了双壳系统有电磁刚度项时的固有频率和振型。
A combination method of the beam function is used for obtaining the natural characteristics of the double shell system.
这里有个例子，一种牡蛎状双壳贝，进化出越来越趋螺旋状的外壳，直到该物种灭绝前，其外壳已经几乎打不开了。
There is a case of an oysterlike bivalve that evolved a more and more spiraled shell until, just before extinction, the valves could barely open.
本次研究在西峡盆地含恐龙蛋地层中首次发现了无脊椎动物化石，如双壳类、叶肢介、腹足类和介形类。
Now we have recovered invertebrate fossils, such as bivalves, conchostracans, gastropods and ostracodes, in the dinosaurian egg-bearing strata.
本次研究在西峡盆地含恐龙蛋地层中首次发现了无脊椎动物化石，如双壳类、叶肢介、腹足类和介形类。
Now we have recovered invertebrate fossils, such as bivalves, conchostracans, gastropods and ostracodes, in the dinosaurian egg-bearing strata.
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