向下的

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。

The typical organisation chart assumes a hierarchical structure, reflecting communication flowing downwards from top management to the departments further down the organisation.

典型的组织系统图承担一个等级结构，反射通信流动向下从最高管理层对部门进一步在组织下。

Taking HPAM solutions as an example, the unsteady flow of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially is calculated; the distribution of velocity, flow rate and stability parameter is obtained; taking HEC solutions as another example, the flow of second order fluid in eccentric annuli with the inner cylinder moving axially is calculated too; the distribution of velocity and stress is obtained; the effect of eccentricity and axial movement on stress distribution on the outwall of the inner cylinder is analysed.

在理论上，分别用二阶流体和幂律流体模型描述聚合物驱油井产出液的非Newton流变性；分别建立了双极坐标系下二阶流体和幂律流体在内管做轴向往复运动的偏心环空中非定常流的控制方程及边界条件和初始条件方程；建立了幂律流体在内管做轴向往复运动的偏心环空中流动的稳定性参数和流体在内管壁上的压力分布计算公式；建立了二阶流体在内管做轴向运动的偏心环空中流动的流体在内管壁上的压力分布计算公式。

Lie down on your back, arms parallel to your body, fingers loosely outstretched and palms downward.

找一处不会被骚扰的地方，躺下双臂与身体保持平衡，手指轻松张开，掌心向下。

Methods A skin incision 3-4cm away from upper lid margin to the place 1cm aboe the superciliary arcy was made in operation.

距上睑缘 3～4mm皮肤切口，向上潜行剥离至眉弓上 1cm ，在上睑眉弓皮肤下与骨膜之间制作 2cm向下滑动的额肌瓣，将额肌瓣和上睑睑板缝合固定。

In some cases, the artery can be found to initially angle superiorly and arch over either the renal vein or one of its branches before proceeding inferiorly.

在有些情况下，发现这条动脉首先向上弯曲，然后形成拱形越过肾静脉或是肾静脉的一条分支，最后才向下行走。

We report a case of primary synovial sarcoma of the kidney showing the following imaging patterns: The tumor occupied the entire left kidney, invaded into the left renal vein and inferior vena cava, and the tumor thrombus extends upward to the level of right atrium, downward to infrarenal IVC.

我们在此报告一个肾脏原发性滑液肉瘤伴随有以下转移的影像特徵：肿瘤占据整个左肾，侵入左边肾静脉以及下腔静脉，并且肿瘤栓塞向上延伸到右心房与向下到肾脏下段下腔静脉。

Inversions are also caused by katabatic winds, that is cold winds flowing down the hillside into a valley, and by anticyclones.

逆转也可能起因於下旋风，即冷风由於反气旋作用沿著山坡向下吹入山谷，造成山谷底部气温较低的现象。

A'.'' tree headfirst for most of the way, then finishes the descent tailfirst.

一只熊头向前沿的树往下爬了一大半，然後倒退着爬下树来。

A coon comes down a tree headfirst for most of the way, then finishes the descent tailfirst.

一只熊头向前沿的树往下爬了一大半，然後倒退着爬下树来。

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。