底部

It has to be tall because it is like a giant block and tackle ,and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are roated bu an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pripe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

钻井必须很高，就象一个巨大的滑轮。我们必须降到地下然后将钻杆拔出来。钻杆的顶端有一个马达使它旋转而底部是一个尖头。

A blue egg with an odd grey blotch on the top and a tan blotch on the bottom.

蓝色鸡蛋一个奇怪的灰色斑点的顶部和谭病的底部。

All the formulas needed for each cell are listed at the bottom of the spreadsheet, and they are initially entered in the boldfaced cells.

所有惯例需要为各个细胞是列出的在报表的底部，并且他们最初地被输入在黑体细胞。

Load at the bottom develops through bond along the embedment length of the cable.

底部的荷载通过埋置的通长锚索的黏聚力产生。

Scientific bore-hole trajectory can not only guide trajectory and predict drilling trajectory parameters, but also optimize bottomhole assembly and improve trajectory control accuracy.

科学的井眼轨迹反演不仅可以指导轨迹设计、反演实钻井眼轨迹参数，而且可以优化钻柱底部组合、提高轨迹控制精度。

Some methods that are usually used now and their characteristics of bore-hole trajectory are introduced; Analysis the main factors which affect bore-hole trajectory; A model of rock-bit interaction is developed by accounting for the anisotropic drilling characteristics of both the formation and the bit; Base on the model of static behavior of a bottomhole assembly design a bore-hole trajectory; produce a demo of bore-hole trajectory base on 3DS Max.

本论文对井眼轨迹反演理论及方法作了简要的分类，介绍了几种目前常用的井眼轨迹反演方法及其特点；分析了影响井眼轨迹的主要因素；综合考虑地层和钻头的各向异性钻井特性，建立钻头与地层相互作用模型，基于钻柱底部组合力学模型设计出一条井眼轨迹；制作了基于3DS Max的井眼轨迹演示动画。

Note how often they culminate on the 60th month , then have a reaction , and make a second top or bott om in the 66th month . Note the number 66 on the Master Twelve Chart .

但是要注意到，市场经常是在60 个月达到顶点，然后出现反方向运动，而头部或底部的第二个顶底位置落在第 66 个月，一定要注意在主 12 图上 66 这个数字的位置！！

If there is no bottom heat, available, place the pot on top of the refrigerator.

如果底部热度不够高，可将盆栽安置在冰箱顶部。

With 70° F bottom heat, seed will germinate in about 21 days, but will require about 40 days under normal ambient growing conditions.

70华氏度底部热，种子会发芽，在大约21天内，但将需要约40天正常周围环境下生长条件。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！