查询词典 metacentric

All 29 pairs of autosomes were acrocentric chromosomes;X chromosome was the second largest acrocentric chromosome and Y was the smallest and the only one metacentric chromosome in all chromosomes.

所有常染色体均为端部着丝点染色体；X染色体为第二大的端部着丝点染色体，Y染色体为最小的且是唯一的中部着丝点染色体。

The chromosomes are composed of metacentric and submetacentric chromosomes, and their karyotypes are rather symmetrical although with evident difference.

结果表明：所有供试材料的染色体数目均为2n=24，核型类型均为&2A&型；染色体主要由中部着丝点和近中部着丝点染色体组成，属较对称核型。

The analysis of these data shows that in the process of evolution the X chromosomes are as conservative as those in other mammals and the intraspecific and interspecific changes of autosomes follow such a rule:the increase of one chromosome in 2n number is always accompanied by the increase of two acrocentrics and the decrease of one metacentric or submetacentric,and vice versa.

对这些材料所进行的分析表明，鹿属动物在进化过程中，X染色体是很保守的，而常染色体的变化，无论是种间还是种内，全是2n数每增加1条，中部或亚中部着丝点染色体数就减少1条，而端着丝点染色体数就增加2条，反之亦然。

Main contents and conclusions obtained in this paper are as follows:The method for the calculation of metacentric height fluctuation is derived for ship sailing in longitudinal and oblique seas, considering the impact of wave profile and assuming quasi-static equilibrium of heave and pitch motions.

本文旨在研究纵浪和斜浪中航行船舶的参激横摇运动问题以及系泊油轮在纵浪中的动力特性和系缆张力的变化特性。

The items of calculation are displacement, foward, aft and mean drafts, longitudinal strength, metacentric height and rolling period etc.

本文讨论了这种配戴仪的框图和使用方法以及在本院远洋实习船《育英》轮上的实际应用情况。

Combining the lost buoyancy method with the added weight one, the calculating methods of curves of statical stability are presented when the damaged warships' metacentric height is negative. Direct calculation method is adopted to correct the effect of the free surface on curves of statical stability.

采用损失浮力法和增加载荷法相结合的方法给出了舰船破损后出现负初稳性时的静稳性曲线计算方法，自由液面对静稳性曲线的修正采用直接计算法。

It is analyzed that the main reasons for negative metacentric height are seepers of cabin in the superstructure. According to the types of curves of statical stability, the righting methods are discussed. It is suggested that the stability should be restored first and then the warship balanced.

分析了上层舱室积水是舰船破损后出现负初稳性的主要原因，根据破损后静稳性曲线的类型探讨了舰船破损后出现负初稳性时应采用先恢复稳性然后平衡舰体的扶正方法。

Referring to the palaeontological data and the geographical distribution of existing species,the authors come to the conclusion that the main mechanism of chromosome evolution of Cervus is the Robertsonian fission,a metacentric or submetacentric fission in the centric region into two acrocentrics.

结合对鹿属古生物学资料和现代各个种的地理分布的分析，作者认为，鹿属染色体进化的主要机制是罗伯逊断裂，即一条中部着丝点染色体在着丝点部位断裂成为两条端着丝点染色体。

There are three types of Y chromosomes for yellow cattle landraces in China, that is, metacentric Y chromosomes, submetacentric Y chromosomes, and acrocentric Y chromosomes, which illustrates the origin of yellow cattle landraces in China from Bos taurus and Bos indicus.

中国地方黄牛Y染色体具有中着丝粒、亚中着丝粒和近端着丝粒3种类型，这说明中国地方黄牛起源于普通牛和瘤牛。

Amblycephala is composed of 13 metacentric chromosome pairs, 9 submetacentric chro-mosome pairs and 2 subtelocentric chromosome pairs, which can be expressed as 26m + 18sm+ 4st.

随着鱼类杂交育种研究的深人，染色体的组型研究也逐渐应用于预测杂交成功与否、杂种能否正常生育等方面。

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。