查询词典 bivalve

The strata in this section cover three lithostratigraphic units, seven conodont zones, five ammonoid zones and three bivalve zones. Two normal and two reversed magnetic polarity zones as well as the cyclic sequences corresponding to the Milankovitch climate periods driven by the Earth's orbit are well recognized in the lower part of the section.

该剖面包括3个岩石地层单元、7个牙形石带、5个菊石带、3个双壳类带；在剖面下段地层中识别出2个正向磁性带和2个反向磁极性带；与地球轨道天文周期相对应的Milankovitch气候沉积旋回也可以明确地辨认；碳氧同位素δ13C演变呈现两次大的旋回。

Bivalve culture is one of most widely practiced mariculture.in China.

贝类养殖是我国海水养殖业中最重要的组成部分之一。

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"。

They called him a bivalve and ran quickly away.

他们叫他软体动物，然后快速跑开

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？

Both halves of this delicate bivalve are exactly matched.

这种精美的双壳贝的两扇完全对称。

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！"

The aim of the research was to discuss the cluster analysis of chromosomes so as to classify bivalve in the cell level.

［目的］探讨利用染色体参数进行聚类分析，以期在细胞水平上对双壳贝类进行分类。

Use 3 pins for each bivalve sample, and a yellow pin only for bivalve 2, in the following way

每种双壳贝样本用三支相同颜色的大头针标示，黄色的大头针仅用於标示样本2，方式如下

At pearl island hatcheries, pearls are cultured from bivalve mollusks, Pinctada maxima and Pinctada mertensii.

在珍珠的繁殖地，珍珠品种有 bivalve mollusks， Pinctada maxima 和 Pinctada mertensii。

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。