For example, sea stars prey on a variety of bivalve mollusks and prevent these bivalves from monopolizing habitats on the sea floor.
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。
Somewhat heart-shaped sand-burrowing bivalve mollusks.
稍有心脏状掘沙的双壳类软体动物。
But did you ever notice anyone try to open the terrestrial bivalve with a typewriter?
但是，你可曾听说过有人试图用打字机来剖开陆生的壳类动物吗？
It was the largest bivalve I've ever seen, with a shell approximately the size and shape of my foot.
可以说它是我曾见过的最大的贝类了。贝壳的形状大小和我的脚差不多。
The discovery of bivalve fossil assemblages supplied the feature of bivalve fauna during the deposition of the Waigucun Formation.
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。
This paper presents basic operating principle and application of bivalve value window comparison switch and three state comparison switch.
本文介绍了双阀值窗口比较开关及三态比较开关的基本工作原理及应用。
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.
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。
A Marine bivalve mollusk of the family Pholadidae, having a long shell with which it bores into wood, rock, and clay, often causing destruction of wharf pilings.
海笋，穿石贝海笋科中的一种海类甲壳软体动物，有长的甲壳，可以借之伸入到木头、岩石和泥土中，常引起对码头堆放物的破坏。
It has a bivalve shell, two strings which move the valves against one another, and a small pump that expels water (he is still working on the best design for the foot).
它具有双贝壳，分别由两根绳控制进行相对运动，还有用来排水的微型泵（他仍在寻找蛤足的最佳设计方案）。
The purification technique, combining bivalve and plant floating-bed, could not only get rid of suspended substance and algae, but also remove the nutrient effectively.
河蚌与植物集成净化技术既能够消除水体悬浮物、藻类，又可有效去除营养盐。
According to both the Oxford English Dictionary and the American Heritage Dictionary, in ancient Greek the bivalve shells you might find at the beach were called ostrakon.
根据《牛津英语词典》和《美国传统英语词典》的词条，在古希腊，那些您可能在沙滩上看到的双壳贝被称为ostrakon。
Phytoplankton is the main food to the bivalve filter-feeders and the marine primary producer, so the impacts on the phytoplankton community by scallop culture deserve studying.
浮游植物是滤食性贝类的主要饵料，也是海洋主要的初级生产者，因此研究贝类养殖对浮游植物群落的影响具有重要的科学意义。
The structural color of nacre in bivalve shells of Pinctada maxima is derived from the combination effects of aragonite-protein multilayer structure and yellow pigments in nacre.
大珠母贝珍珠层的结构色是由文石板片和蛋白质层构成的多层薄膜结构和黄色素的共同作用决定的。
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.
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 new standards adopted will go a long way towards protecting human health, as they set out new, maximum limits for lead in fish, cadmium in rice, marine bivalve molluscs and cephalopods.
通过的这些新标准将对保护人类健康大有帮助，因为它们提出鱼类中铅以及大米、海洋双壳贝类和头足类动物中镉的新的最高限量。
The structural color and microstructure of nacre in bivalve shells of Pinctada maxima were investigated by optical reflection spectra, scanning electron microscopy and theoretical simulation.
采用反射光谱、扫描电镜及理论模拟计算对大珠母贝珍珠层的结构色及微结构进行了系统的研究。
The structural color and microstructure of nacre in bivalve shells of Pinctada maxima were investigated by optical reflection spectra, scanning electron microscopy and theoretical simulation.
采用反射光谱、扫描电镜及理论模拟计算对大珠母贝珍珠层的结构色及微结构进行了系统的研究。
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