查询词典 bivalve

Genus and 40 species of Jurassic Pteriomorphia and Isofilibranchia from Northern Tibet were described in present paper. The data of genus and species of Jurassic Pteriomorphia and Isofilibranchia from Northern Tibet, Southern Tibet, and India were studied with cluster analysis respectively. The Jurassic palaeobiogeographic and palaeogeographic relations of these three regions were also discussed on the basis of the result of cluster analysis and analysis of the controlling factors of bivalve distribution.

本文记述了藏北侏罗纪双壳类Pteriomorphia和lsofilibranchia化石22属40种，对藏北、藏南及印度侏罗纪Pteriomorphia和Isofilibranchia的属和种分别进行了统计和聚类分析，以此探讨这三个地区之间的古生物地理关系，并进一步分析了控制侏罗纪双壳类分布的因素及讨论了藏北、藏南与印度这三大地块的古地理位置。

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

A mar 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

Wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells.

象虫一样的海生双壳类动物，用其象钻一样的壳在木质的桥墩和船只上钻洞。

When the Thompson quadruplets espied him one day,they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他，&双壳贝！&

When the Thompson quadruplets espied him one day, they called him a bivalve and ran quickly away.

有一天，汤普森家的四胞胎看见他，&双壳贝！&喊完后一溜烟的跑走了。

Fig.4 XRD profiles for different shell layers, celom filling and surrounding rock of the rudist bivalve shown in Fig.3

1，2，3：分别为与图3对应的厚壳蛤的不同壳层；4：为体腔充填物，成分为微晶灰岩

Under this scenario, the long-term decline in bivalve mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods.

据此软体动物幼体的长期减少反映了深海十足类对其幼体和成体的掠食。

This allowed them to follow 431 "lineages" of marine bivalve through the course of geological time.

这样，他们便可以沿着地质学的时间轴逐个研究431支海洋双壳类的&世系&。

Thin-shelled bivalve having the right valve deeply notched.

薄壳的双壳类动物，其瓣膜的凹曹很深。

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。