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1·The paper introduces the design course of the modular machine tool for multi-hole concentration gearbox.

介绍了多孔密集型箱体组合机床的设计过程，实际证明该机床设计严谨规范，又有技术创新，使用效果良好。

2·Hall coefficient depends on electronic concentration and the relative values of empty hole concentrations and their migration rate in the semiconductor.

而霍耳系数取决于半导体材料中电子浓度和空穴浓度的相对大小及其迁移率之比。

3·Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl.

大多数天文学家认为，星系中心的大量物质是一个黑洞，它的引力导致气体旋转。

4·The hole isn't literal; no part of the stratosphere is empty of ozone. But scientists use the hole metaphor to describe the area where ozone drops below a historical concentration of 220 Dobson Units.

这里所谓的“空洞”不是字面上含义，并不存在任何一处平流层完全没有臭氧，科学家们用空洞这一说法来描述这些臭氧浓度低于历史读数220多布森单位的区域。

5·The right image shows the concentration of chlorine monoxide, which is concentrated over the Arctic where the ozone hole developed.

右图则显示了氯化物的浓度分布，而其也恰好在出现臭氧洞的地方呈现出高值分布。

6·A black hole is a concentration of mass great enough that the force of gravity prevents anything from escaping from it except through quantum tunneling behavior.

一个黑洞是物质浓缩到足够大的以致引力除了通过量子隧道行为之外阻止任何东西从它那里逃逸。

7·Most astrophysicists accept that this is the case, since according to general relativity, any concentration of matter of sufficient density must necessarily collapse into a black hole.

大多数天体物理学家接受这个情形，自从依照广义相对论，充份密度物质任何集中一定必然坍缩为一个黑洞。

8·Thus the lack of such flare-ups around a compact concentration of mass is taken as evidence that the object is a black hole, with no surface onto which matter can be suddenly dumped.

因此密集度很高物体周围这类闪光的缺乏被获得物体是一个黑洞的证据，由于没有表面物质进入可能是突然倾卸之上。

9·The effects of such machining parameters as voltage, type and concentration of electrochemical fluid, materials etc on the cooling hole formation were also analyzed.

实验同时分析了加工参数如加工电压、电解液种类和浓度、加工材料等对冷却孔成形的影响。

10·Conclusion: the main reason of refracture through the last screw hole in plate fixation is over-stress concentration.

结论钢板边缘末位螺丝钉孔处再骨折的发生，主要与钢板两端应力集中有关。