查询词典 reproductive

Mammalian embryo implantation is an important step of the reproductive process , and is critical to pregnancy.

哺乳动物的胚胎植入是生殖过程的一个重要环节，是妊娠的关键。

Porcine reproductive and respiratory syndrome virus is classified in the family Arteriviridae in the newly created order Nidovirales. Typical clinical signs of PRRSV infection in susceptible animals include inappetence, fever and respiratory disease in pigs of any age and abortion or increased proportions of stillborn and weak-born pigs in pregnant animals.

猪繁殖与呼吸综合征(Porcine Reproductive and Respiratory Syndrome，PRRS)是由猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus，PRRSV)引起的一种严重危害养猪业的烈性传染病。

The inapposite photoperiod may result in delayed reproductive phase or even back to vegetative growth.

一旦光周期条件不适，这些品种的生殖生长就会延迟，甚至可从生殖生长状态逆转到营养生长状态。

Objective To study reproductive performance of inbred Wistar rats.

目的 对近交系Wistar大鼠进行繁殖性能的测定。

The basic reproductive number is the average of secondary infections produced by a typical infective during the entire period of infectiousness .

在研究中对这些模型引入了再生数，其意义为一个病人在染病期内平均感染的人数，再生数决定平衡解的稳定性及地方病平衡点的存在性。

The fifth part of the main content of reproductive rights issues of infringement and relief.

第五部分的主要内容是生育权的侵权与救济问题。

Asexual reproduction The formation of new individuals from a ingle parent without the production of gametes or special reproductive structures.

无性生殖：没有配子的产生或者其他特殊的生殖结构产生，直接从父母中的任何一方发育为新个体的生殖方式。

Genetic effects include inheritable changes resulting from mutations in reproductive cells.

遗传的影响包括再生细胞变异引起的遗传变化。

Subsequent DNA tests suggested that doctors at New York Medical Services for Reproductive Medicine accidentally used another man's sperm to inseminate Nancy Andrews' eggs.

随后的DNA检测显示纽约医疗服务中心负责生殖药物的医师意外地使用了另一个男人的精子与南西的卵子实施了人工受精。

Human Reproductive Medicine in the history of a major initiative, the origin of artificial insemination in animal studies.

人类生殖医学史上的重大创举，起源于动物人工受精的研究。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。