查询词典 stem

In order to prevent abrasion and extend the service life, people deal with all kinds of researches. Now, people use a new method of preventing drill stem abrasion －Install non-rotating protector in the part near drill stem tie-in to solve this problem effectively.

为防止钻柱磨损和延长钻柱的使用寿命，人们从事了各种各样的研究工作，目前，工程上采用了一种新型的防磨方法——在靠近钻柱接头的部位，安装非旋转防磨减断保护套，有效地解决了这个问题。

This method displays the whole process of the contact between drill stem and well wall, and gives contact points and contact forces. It provides a reliable and practical aidlifetime of the drill stem. The method presented in this paper may also be adapand extended reach well drilling.

为实钻时，防止钻柱磨损和对钻柱寿命的预测提供了依据，对钻柱的结构设计以及钻柱力学的研究具有一定指导意义，本方法适用性强也可应用于定向井、大位移井等同类问题的研究。

In the existing buckling analysis of drill stem in horizontal condition,the drill stem is thought of as an even rod with equal diameter and sticked on the below wall of well on the action of deadweight,so it was simplified as simply supported beam compressed axially and supported evenly along its length by well wall.

在现有的水平状态下钻柱屈曲研究中，一般把钻柱看作均匀的等直径杆，认为钻柱在其自重的作用下，紧贴下井壁，因而通常把水平状态下的钻柱简化为在整个长度上受到井壁均匀支承的轴向受压的简支梁。

This method displays the whole process of the contact between drill stem and casing-pipe wall. Gradual simulation is used to dynamically simulate the best position of appending non-rotating drill stem protector. By this way, we can find out contact points and contact force, then make certain the position and number of installing protector.

并采用逐步模拟法，对钻柱添加非旋转防磨减断保护套的最佳位置进行仿真分析，得到钻柱与套管壁的接触区域及接触力，确定非旋转防磨减断保护套的安装位置以及所需安装的数量，为合理使用非旋转防磨减断保护套提供理论依据和前提。

According to the editorialist, the idea for studies such as this one exploring the possibility that tumor growth is driven by pluripotent cells considered cancer stem cells comes from work in the hematologic cancers, where stem-cell research is well established.

根据编辑评论，本研究的想法之一为肿瘤生长的可能性是受多潜能干细胞驱动，认为癌症干细胞是来自血液方面癌症，这方面的干细胞研究已经有一定成果；Massague医师指出，在肿瘤出现这一类的干细胞是十分有趣的，特别是这些肿瘤存在少数结果却是最阻抗治疗的。

Most researchers reported that neuroendocrine cell's were the results of stem cell's multi-directional differentiation, like epithelial cell, which is originated from endoderm multipotential stem cells.

多数研究认为，神经内分泌（neuroendocrine，NE）细胞和上皮细胞均来自内胚层多潜能干细胞，是肿瘤发生过程中干细胞多向分化的结果。

In hematopoietic stem cell transplantation, different originated and differentiated DCs can be modulated to prevent and cure GVHD, and to promote engraftment of hematopoietic stem cells.

但是在发挥移植物抗白血病作用的同时常常会导致严重的移植物抗宿主病，GVHD是Allo-HSCT最常见的并发症，严重的GVHD也是影响移植成功的关键。

Method］ The main stem height, main stem leaf number and fresh and dry weight of Eupatorium odoratum were measured in different light intensity in the field.

方法］以飞机草为研究对象，在田间测定了不同光照率对其主茎生长高度、主茎叶片数和鲜干重的影响。

Each cycle includes anagen, catagen, telogen and exogen which requires the replacement of died cells with new cells. During the self-renewing of tissues, stem cell must keep proliferating and differentiating to maintain the amount of stem cells and to generate differentiated cells in order to maintain the the number and the functions of the cells.

在组织更新过程中，需要干细胞的不断增殖和分化，维持干细胞群体的大小，分化出子细胞，保持总的细胞群体的恒定和各种生理功能。

It is one of hot spots that cerebrovascular disease has been treated by stem cells explantation,and the investigative emphasis is the traditional Chinese medicine's effect on stem cells transplanted into vivo.

干细胞移植治疗脑血管病是目前研究的热点之一，中药对移植于体内的干细胞的影响是我们研究的重点。

What was it that made you want to change sider ?

是什么使你临阵倒戈？

I don't know what he wants, but let's play along with him.

我不知道他要干什么，可我