Top-bottom mapping — Mapping begins in the root of the target and goes down.
自上而下映射 — 映射始于目标的根，然后往下进行。
The information on top, bottom and top-bottom mixed blowing with regard to the mixing time are given.
文中给出了有关纯顶吹、纯底吹和顶底复合吹的有关搅拌情况。
There were optimum matching of top blowing rate and bottom blowing rate and corresponding location during top-bottom blowing to get better effect.
顶底复吹时，为取得较好的效果，亦存在顶吹-底吹气量的最佳配合及相应的有利位置。
The top-bottom combined blown process for the electric arc furnace has advantages of low cost, ease of operation and satisfactory agitation results.
电弧炉顶底复吹技术，具有成本低，操作方便，搅拌效果好等优点。
A laboratory study was carried out in a hot model to investigate the characteristics of metallurgical reactions in oxygen top-bottom combined blowing process.
通过热模型实验对纯氧顶底复吹转炉的冶金反应规律进行了研究。
The work principle and maintenance method of bottom gas-feeding brick in top-bottom duplicate blown converter are stated, it is proposed how to make the bricks synchronized with furnace life.
论述了顶底复吹转炉底部供气砖工作原理、维护方法，提出了如何操作才能使底部供气砖与炉龄同步的理论与具体措施。
"It's tough at the top," he said. "It's tougher at the bottom," riposted the billionaire.
“身居高位很辛苦，”他说。“在底层更辛苦，”亿万富翁机敏地答道。
There's an angler fish at the bottom of the ocean that has a rod sticking up from the top of its head with a lure to capture other fish.
在海底中生活着一种琵琶鱼，它的头顶有一根突出的杆，带有用来捕获其他鱼类的诱饵。
Leave a gap at the top and bottom so air can circulate.
在顶部和底部各留一点空隙，这样空气就可以流通了。
We started from the bottom and we had to work our way up to the top.
我们从最底层做起，必须奋斗到最高层。
The top and bottom line of each column on the page should align.
版面每栏的头一行和末一行要对齐。
We cleaned the house from top to bottom.
我们把房子彻底打扫了一遍。
She would clean the house from top to bottom.
她会彻底地打扫房子。
Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged.
带正电荷的粒子集中在云团的顶部和底部，但中间区域形成的是带负电荷的粒子。
When the rig sank, the riser broke near the top while remaining attached to the blowout preventer at the bottom.
当钻井平台下沉时，立管在顶部附近的地方断裂，同时另一端仍与底部的防喷器相连。
To help generate lift to keep midwater, the top of the tail extends farther back than the bottom, creating a slant along the back edge.
为了保持在水中不至于沉底，尾部的顶端比底端向后延伸，沿着后端形成一个斜面，产生提力。
If the glass were kept hot enough, it would flow over the molten tin until the top surface was also flat, horizontal and perfectly parallel to the bottom surface.
如果玻璃保持足够的温度，它就会在熔化的锡中流动，直到顶部表面也变得平整、水平，与底部表面完全平行。
The idea that those at the bottom can rise to the top is central to America's ideas about itself.
美国自我认知的核心便是社会底层的人有机会跃居社会顶层。
它有顶有底。
"When the bottom of the mountain is summer, the top is spring and while the foothill is autumn, the top is covered with ice," local people say of the special climate of Shennongjia.
当地的人们这样形容神农架的特殊气候：“山脚下是夏天，山顶是春天，山脚下是秋天，山顶被冰雪覆盖。”
Before the Spring Festival, every Chinese household would have their houses cleaned from top to bottom.
在春节之前，每个中国家庭都会把自己家从上到下彻底打扫一遍。
The clerical workers considered factors such as quality of work performed and job knowledge near the top of their list, but these were at the bottom of the production workers' list.
文员们把工作质量和工作知识等因素放在工作清单的最前面，但这些因素在生产工人的工作清单中却排在最后。
In the second place, we cleaned their houses from top to bottom, getting rid of the dirt accumulated for years and giving a brand-new environment to them.
第二，我们彻底清扫了他们的房子，清除了多年积累的灰尘，给他们一个全新的环境。
Before the Spring Festival, every family would clean their houses from top to bottom.
春节前，家家户户都会彻底打扫房屋。
Waves are measured (测量) from the top (crest) to the bottom (trough).
海浪是从波峰到波谷进行测量的。
The sand falls from the top of the sand glasses to the bottom.
沙子从沙漏的顶部落到底部。
Why do you paint on the bottom half of your paper, but not on the top half?
为什么你画在纸的下半部分，而不是上半部分？
Gnuplot draws the borders of the boxes in this order: top, bottom, left, and right, with their respective values: 1, 2, 4, 8.
gnuplot按以下次序绘制框的边框：顶、底、左和右，值分别为1、2、4、8。
As a default, the template calls for 3 points of space at the top, bottom, left, and right of the table cell.
缺省情况下，模板要求表单元的顶部、底部以及左右两边各留有距离为3点的空间。
All the faces of the body - top, bottom and four sides - are transparent.
表身上所有面，包括顶部，底部和四面都是清晰的。
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