临界值

The result shows that: the extraction of petroleum ether, polysaccharide and sodium copper chlorophyllin from banana leaves perform higher spumescence ability and foam stability. The critical concentration form pastern namely CMC and the surface tension in this concentration are 1.0 g/l (34.295 mN/m), 1.0 g/l (42.398 mN/m), 3.0 g/l (40.123 mN/m) respectively, which the value is close or excess the reference samples. The emulsify capability of the extraction of petroleum ether is the best in these active ingredients, and close to the emulsify capability of Tween-80. The emulsify capability of polysaccharide and sodium copper chlorophyllin from banana leaves are follow then.

试验结果表明：香蕉叶石油醚抽出物、叶多糖和叶绿素铜钠盐具有良好的起泡性和稳泡性；其临界胶束浓度CMC值和其该浓度下的表面张力分别为：1.0g/l（34.295 mN/m），1.0g/l（42.398 mN/m），3.0g/l（40.123 mN/m），已经接近或超过参照物的表面活性；香蕉叶石油醚抽出物的乳化能力最强，乳化性能已接近乳化剂吐温-80，其次为叶多糖和叶绿素铜钠盐。

The high quality, unoxidized plate ingots are manufactured. Diffusion/rolling welding composite processing is designed to coat the Al-Li ingots. The thickness of coating layers can be controlled accurately between 0.05-0.10mm.

使用楔形块轧制方法，评价了均化处理和在轧制温度对Al-Li合金铸锭临界塑性变形压下量D的影响，结果指出，可根据材料强度要求选择C制度均化，Al-Li合金都显示出有优良的热轧塑性，D值在50-60%。

These two parameters depend upon geometric conditions of unsignalized intersections, vehicle types and traffic volume.

交叉口的不同几何构成，不同的车辆组成以及车流量大小，都影响着临界间隙值的大小。

It is very importation for our country to determine the critical gap and follow up time value at unsignalized intersections in China typical region under the current road and traffic conditions.

在我国道路交通条件下，确定具有代表性的公路交叉口临界间隙和随车时距值，具有重要意义。

The results show that the anodic reaction is rapid and the current increases quickly and the specimen's surface is bestrewed with arc discharge when the anodic voltage exceeds 170 V.

结果表明：氧化过程存在一个明显的临界电压值(170 V)，在电压大于170 V阳极氧化反应剧烈、氧化电流增大、试样表面出现弧光放电。

A closed-air system is defined as a partially saturated soil of such high degree of saturation that the air in the pore space forms isolated bubbles which are entirely enclosed by surrounding ...

通过试验，证明了这三种基本水-气形态的存在，并给出了相邻两系统之间的临界饱和度约值。非饱和土的水-气形态的改变对其力学性质有着重大影响，并通过试验论证了两者之间的关系。

Based on exploding dynamics theory, the scope of smash area, crush area and crack area, which is shaped under the action of a blast wave and stress wave resulting from the explosion of cartridge bag, is studied respectively.

基于爆炸动力学理论，得出了药包爆炸裂隙区半径的计算值与药卷临界埋藏深度基本吻合的结论，从而证明了&三区&理论计算式的正确性，为特定条件下爆破工程控制参数的设计提供了理论依据。

In this paper, The influence of heat set and dyeing on the structure of PTT fiber was investigated by FT-IR, DSC, critical dissolution time. The influence of heat set on the dyeability of PTT fiber was discussed, too. Meanwhile, many experiments on the dyeing performance of PET fiber were carried out. The effect of different dyeing temperature on the uptake and visual color depth value and dyeing characteristics of different dyes with temperature increasing were discussed, and the influence of temperature on the dyeing depth were also evaluated when dyeing for PTT and PET fiber in the same dye bath condition. Especially the kinetics and thermodynamics of dyeing with disperse dyes were mainly studied.

目前，我国对PTT染色性能方面研究报道还少，本文用傅立叶红外光谱、差热分析、临界溶解时间等分析方法研究了热定型和染色对PTT纤维结构的影响，探讨了热定型对PTT纤维可染性的影响，同时进行了多项PTT纤维的基本染色性能试验，探讨了不同染色温度对上染百分率及表观色深值的影响、不同染料的升温上染特性、不同染料的移染性能和染深性能以及PTT和PET纤维同浴染色时染色温度对它们的染色深度的影响。

The critical parameters of 80 esters and ethers have been systematically collected and evaluated,and 189 values are recommended.

系统地搜集并评定了80个酯和醚类化合物的临界参数，给出了189个推荐值，按其可靠性、一致性和测定年代给出其质量码。

The competitive exclusion principle states that coexistence can only occur in a stable environment if the species niches are differentiated.

竞争排斥原理陈述，共存只能发生在两物种生态位分化的稳定环境中。共存各需要多少生态位分化在资源利用分化上的临界阈值叫做极限相似性。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷