查询词典 artificial fecundation

In fact, current condition is mainly caused by artificial factors. Among the artificial factors, overgrazing is considered to be the foremost one.

在导致草地退化的诸多人为因素中，过度放牧被认为是造成草地退化的主要因素。

In this paper, male sterile line of alfalfa was used to be improved with crossing, because the seed production of crossing is low. The affecting factors of seed production of male sterile line of alfalfa and its crossing progenies that are crossed with male sterile lines of alfalfa and good alfalfa that male is fertile were analyzed. The characteristics of female reproductive organs of male sterile line and its crossing progenies are analyzed in cell morphology. The genetic difference of male sterile line and its crossing progenies are analyzed in enzyme protein. The results showed: 1、Rate of podding of nature crossing and fecundity of artificial crossing of the male sterile plant BC1-2 that is the crossing progency of male sterile line of alfalfa and Medicago varia Martin.cv.'Caoyuan No.1'is higher than male sterile lines. Rate of podding of nature crossing and fecundity of artificial crossing of the male sterile plants BC1-19、BC1-21、BC1-22、BC1-23 that are the crossing progencies of male sterile line of alfalfa and Medicago sativa L.cv.

针对苜蓿雄性不育系杂交制种产量低的问题，采用杂交法对苜蓿雄性不育系进行改良，以原苜蓿雄性不育系为轮回亲本与雄性可育优良苜蓿品种杂交，分析苜蓿雄性不育系及其杂交后代种子产量的影响因素，从细胞形态学方面观察和分析杂交后代及原不育系在雌性生殖器官上的变异特点，从酶蛋白水平对杂交后代及原不育系的遗传差异进行分析，初步研究结果如下： 1、苜蓿雄性不育系与草原一号苜蓿的杂交后代不育株BC1-2，以及苜蓿雄性不育系与X′(苜蓿雄性不育系与新疆大叶苜蓿的杂种F1代)的杂交后代不育株BC1-19、BC1-21、BC1-22、BC1-23的天然杂交结荚率和人工杂交制种的结荚率和百粒重均高于原苜蓿雄性不育系。

Humanistis one kind to artificial reveres, by the artificial heavy educationvalue orientation.

以人为本是一种以人为尊、以人为重的教育价值取向。

The outcome of the study shows that Artificial Intelligence is an inevitable result with the changes of human thoughts as to the aspects of its focuses, methods and contents and that Artificial Intelligence richens and enhances the development of dialectical materialism and dialectics and deepens human understanding of epistemology.

它进一步丰富和发展了辩证唯物主义，引起了认识论的深化，促进了辩证法的发展。

Clinical medium usually run into some serious tooths week the tooth row of patient's defection and damage, its artificial teeth repairs an opposite difficulty, can choose a cone form set tube hat artificial teeth, even if tooth week blaze a patient the tooth row only remain 1~5 natural tooths, can also repair.

临床中常常碰到一些严重的牙周病患者的牙列缺损，其义齿修复相对困难，可选择圆锥形套筒冠义齿，即便牙周炎病人牙列仅剩1~5颗天然牙，也可修复。

In computer science there is a famous conjecture called the Church/Turing hypothesis which undergirds much of the reasoning in artificial intelligence and artificial life.

计算机科学理论里有个著名的猜想叫丘奇/图灵[5]假设[6]，加强了人工智能和人工生命研究的大部分推理。

In computer science there is a famous conjecture called the Church/Turing hypothesis which undergirds much of the reasoning in artificial intelligence and artificial life.

计算机科学理论里有个著名的猜想，丘奇/图灵[5]假设[6]，它加强了人工智能和人工生命研究的大部分推理。

In computer science there is a famous conjecture called the Church/Turing hypothesis which undergirds much of the reasoning in artificial intelligence and artificial life.

计算机科学理论里有个著名的猜想叫丘奇/图灵[5]假设[6]，成为人工智能和人工生命研究的主要逻辑基础。

In computer science there is a famous conjecture called the Church/Turing hypothesis which undergirds much of the reasoning in artificial intelligence and artificial life.

计算机科学理论里有个著名的猜想叫丘奇/图灵（译注4）假设（译注5），成为人工智能和人工生命研究的主要逻辑基础。

Ackley is a bear of a guy with a side-of-the-mouth wisecracking delivery. He broke up 250 serious scientists at the 1990 Second Artificial Life Conference with a wickedly funny video of a rather important artificial life world he and colleague Michael Littman had made.

艾克利是壮得像头熊的家伙，一张大嘴巴总是妙语连珠。1990年第二届人工生命会议上，他播放了和同事迈克尔利特曼(2)一起制作的相当重要的人工生命世界的别出心裁的录像，迷倒了在场观看的250位严肃的科学家。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。