恒定

Different surgical approaches to the sphenoid sinus should be chosen based on the target of the operation; the arcus choanalis, the middle and superior turbinates are invariable orientative landmarks for sphenoid sinus.

根据手术的目的可以选择不同的方法开放蝶窦，中鼻甲、上鼻甲以及后鼻孔弓都是定位蝶窦的恒定标志。

Basing on Fuzzy reasoning technology, this paper introduces the work flow of Gas water heater, and the trait of papilionaceous valve.

讨论了模糊推理算法在燃气热水器中的应用，此算法不依赖于被控对象精确的数学模型，主要是通过控制燃气流量即控制燃气蝶阀来达到恒定温度的目的。

The constant back pressure cavity with papilionaceous slot is found to be of good economy and reliability by means of analyses for various back pressure cavities.

通过几种形式的背压腔结构分析，认为带蝶形槽的准恒定背压腔结构具有较好的经济性及可靠性。

If the substrate material of planeness badnessand scaleslinearlywith in large, solid, it is difficult to maintain a constant business card printing and membership card making pressure, it is very prone to business card printing and membership card making pressure, imprinted holdout attachthemselves poor and ink color piles'quality.

如果承印物质料的裂缝量欠好，伸缩性不小，浮松性不不对，难以保留恒定的制卡和会员卡制作压辛，很便当爆发制卡和会员卡制作压辛不平衡、痕迹不朱层附着不牢和不朱色发花质量弊病的。

The special tribo-electdc tester with high sliding speed and electric current was developed,which mail working parameters are, current density up to 2.5 A/mm~2, the sliding speed 100 m/s,the load over 500 N (3.2 MPa) and the pulsant strike pressure within 20 N. This testersuccessfully simulates the tribological and electric properties of strip materials. 2, By using the above tester, study on tdbological properties and carrying currentperformances of copper-base powder metallurgy material and metal impregnation carbonmaterial are carded out.

本论文开展的主要研究内容和所取得的成果如下： 1、首次开发了大电流、高速度和重载荷的载流摩擦磨损专用试验机，能够稳定提供恒定交流电流密度2.5 A／mm~2，相对滑动速度100 m／s(12000 r／min)，载荷可达500 N(3.2MPa)，脉动冲击载荷可达20 N，为研究提速接触网和滑板的高速载流摩擦学特性及其机理，以及开发新型高耐磨性、高载流性能滑板材料提供了先进可靠的试验手段(该机已获得一项实用新型专利，ZL 2006 2 0096036.5)。

Further, the shakedown domains in 3-dimensional loading space are obtained through investigating the axi-symmetric structures subjected to the combination of three kinds of loads, constant and pulsative internal pressure, and pulsative temperature fields.

进一步对含缺陷轴对称结构在恒定压力、脉动压力、脉动温度的共同作用进行了安定分析，得到了三维载荷空间的安定域。

The system may be operated to keep the top composition constant by increasing the reflux ratio as the composition of the liquid in the reboiler changes.

间歇精馏操作可以通过随着再沸器中液相组成的变化，逐渐增加回流比，以保持塔顶馏出液组成恒定。

Always recrystallize a product to constant melting point.

你总是可以通过对产物进行再结晶以得到恒定的熔点。

Always recrystallize a product to constant melting point.

你总是可以通过对产物进再结晶以得到恒定的熔点。

A long solid specimen is resistively heated to a steady high-temperature state by a steady electrical current.

利用恒定大电流将一个长试样加热到高温稳态，由于存在热传导和辐射，试样表面的温度分布是不均匀的。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。