查询词典 pre-existence

He experiment proved that pre-implantation embryos are more sensitive than post-implantation ones, suggested TCDD may exert its effect before implantation, or at this process. 3. The toxicity of TCDD on the early embryo can be of omnifarious. It can strongly inhibit DCR, which represent mother toxicity; It cause un-synchronizated cleavage of pre-implanted zygote and pre-implanted embryo loss; It also decreases implantation sites in the uterus, and continued to effecting the uterus of pregnant mouse, cause the decreased number of fetus before birth. 4. TCDD exposure changed reproductive hormone level of pregnant mouse.

CDD对胚胎的毒性影响可能是多方面的：强烈抑制子宫蜕膜细胞反应，表现出典型的母体毒性；虽然没有影响胚胎转运速度，但造成着床前胚胎的丢失和发育不同步；早期染毒降低了第9天的胚胎着床数，同时使出生前第18天胚胎成活数继续减少。

Differing from the feed-back error compensation method, the selflearning error pre-compensation method offered by the paper is based on both ANN and time series technique to obtain the error pre-compensating curve using the non-linear ANN pre-compensation model. Because of the self-learning character of the ANN, this new type of precompensation model can be self-adjusted.

与常规的反馈补偿方法不同，本文提出的自学习误差预测补偿方法，将时间序列预测与神经网络的自学习自适应优化建模技术相结合，利用神经网络非线性预测模型产生误差预补偿函数，并利用神经网络的自学习特性对所建预测模型进行修正，所以这种新型的误差补偿方法能够获得更高的误差补偿精度和控制速度，简单实用，适于推广，具有生产应用价值。

Field survey and laboratory study of the "Zhuzhou conglomerate" at Zhuzhou Village near Dikou Township, Jian′ou City, Fujian, indicate that the "Zhuzhou conglomerate" is neither the basal conglomerate of the pre-Sinian Longbeixi Formation of the Mamianshan Group nor structural brecciate in the pre-Sinian basement, but the basal conglomerate stratigraphically equivalent to the Late Triassic Dakeng Formation (T3d), unconformably overlying the pre-Sinian Dikou Formation.

对发育于福建建瓯市迪口镇竹洲村的&竹洲砾岩&的野外调查和室内研究表明，该砾岩既不是前震旦系马面山群龙北溪组的底部砾岩，也不是构造砾岩，而是相当于晚三叠世大坑组(T3d)层位的底砾岩，不整合沉积在前震旦系迪口组之上。

This article discusses the process of teacher education from unity to diversification, and analyses the questions of teacher profession in student selection, pre-job education, practical training, qualification, employ, and on-job education. It recommends 11 improvement strategies as follow: to control severely and to make better demand evaluation, to preserve partly students at government expense to spread excellent mission, to postpone the pre-job education to graduation, to make system and resource soundness in teacher education center, to make the curriculum of pre-job education flexible, to communicate college and school closely, to examine qualification actually, to unitize the teacher employ impartially, to bring the outsider into the teacher arbitration board, to classify teachers, and to found the major on-job education unit drawing up the integrated on-job education system.

摘要本文探讨我国师资培育从封闭一元到多元开放的历程，并从教师专业的角度分析师资培育多元化之後，在甄选学生，职前培育，实习，资格检定，教师聘任，以及进修等方面所遭遇的问题，对於这些问题提出下列十一项改进策略：需要严格把关，并做好需求评估；保留部分师范公费生以传承优良使命；师资培育职前课程应延至学士程度之後；「师资培育中心」制度须健全，资源须充分；职前培育课程必须具有弹性，避免固定僵化；大学与实习学校必须共同规划，密切交流；资格检定必须经过实质审查；聘任的方式必须有一致性与公平性；教评会应考虑纳入外部人士；师资培育多元化须配合教师分级制度；成立专责进修单位，规划整全系统的进修制度，提升教师进修品质。

Such as through "speculation" to create false shortages market and took the opportunity to raise prices; Through housing area has, architectural changes, the environment described reports of violations of property buyers and others; Housing has to be pre-sale collateral, the pre-sale housing to have pre-sale, re-mortgages, and even the final "absconding with money."

如通过&炒楼&制造出市场的虚假紧缺，借机抬高价格；通过房屋面积缩水、建筑设计变更、环境描述浮夸等行为来侵犯购房者权益；把已抵押的房屋再预售，把已预售的房屋再预售、再抵押，甚至最后&携款潜逃&。

The paper machine comprises a headbox (100), a gap former (200), a press section (300) which comprises at least one extended nip press, a pre-dryer section (400) in which a web is dried applying at least cylinder drying (R1-R7), a pre-calender (500) in which the web is pre-calendered, at least one portion which is formed of a coating station (600) and an after-dryer section (700) and in which the web is coated on both sides applying a film coating method or a non-contact coating method and dried applying at least contact-free drying (710), an end calender (800) in which the web is calendered, and a reel-up (900) in which the web is reeled.

所述纸机包括流浆箱(100)；夹网成形器(200)；包括至少一个延展压区的压榨部(300)；至少采用烘缸(R1-R7)对纸幅进行干燥的预干燥部(400)；对纸幅进行预压光的预压光机(500)；由涂布站(600)和后干燥部(700)形成的至少一部分――其中，纸幅的两面都用薄膜涂布法或非接触涂布法对进行涂布，且至少采用无接触干燥(710)对纸幅进行干燥；对纸幅进行压光的端部压光机(800)；以及卷取纸幅的卷取部(900)。

The samples have lower permittivities by adding MgO before Ba0.6Sr0.4TiO3 powder be pre-synthesized, but have higher tunabilities and lower high frequency losses by adding MgO after Ba0.6Sr0.4TiO3 powder be pre-synthesized. The tunabilities of the samples prepared by adding 15%~25% MgO after Ba0.6Sr0.4TiO3 powder be pre-synthesized are all higher than 20% at 103 V/mm.

MgO添加量相同时，在预合成BSTO前加入，样品的介电常数较低；在预合成BSTO后加入，样品的高频损耗较小，可调性较高，当添加质量分数为15%~25%的MgO，样品在10^3V/mm电场强度下的可调性均高于20%。

Methods 360 cases of primiparas of single bearing were selected and grouped according to pre-pregnancy BMI and prenatal BMI respectively:33 cases of pre-pregnancy obesity group and 327 cases of normal pre-pregnancy weight group;204 cases of prenatal obesity group and 156 cases of normal prenatal weight group.

方法选取单胎初产妇360人作为研究对象，分别按照孕前和产前体质指数分组，孕前肥胖组33人，孕前体重正常组327人；产前肥胖组204人，产前体重正常组156人。

This article study the most three factors of influence in pre-splitting blasting , which are powder capacity per meter 、 spacing of hole and decoupling. On the basis of ANSYS/LS-DYNA and establishing 3D model about two pre-splitting holes, numerical value sumilate expanded process of the crack , then estimates effect of the rock crash by analyzing stress , otherwise estimates effect of pre-splitting blasting by expanded picture .

本文研究了预裂爆破中影响最大的三个因素：线装密度、周边眼间距及周边眼的不耦合系数，并利用动力有限元分析软件ANSYS/LS-DYNA，建立两预裂孔爆破的三维模型，数值模拟出预裂爆破裂缝扩展过程，然后通过应力值的分析来判断岩石的破碎情况，另外利用预裂缝的扩展图分析预裂爆破的效果。

The effect of domestic GCC and clay on pre-coating coverage of the coated kraft liner board was studied. In order to optimize the second pre-coating, the effect of using TiO2 and using calcined clay to replace part of the TiO2 as the pigment on the coating coverage in the second pre-coating was also investigated.

研究了国产GCC、高岭土两种颜料及其不同组合对涂布牛皮卡纸预涂覆盖性的影响，并在此基础上，对二次预涂进行优化，研究了二次预涂中添加进口钛白粉及用国产煅烧高岭土部分代替进口钛白粉和高岭土对涂层覆盖性的影响。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。