查询词典 irreversible process

In comparison with the sample directly sintered at 650 ℃＜TN, an interesting, irreversible transformation in the crystal structure of the MgB2 phase is observed with the sample going through the stages of initial sintering at 750 ℃, then re-sintering at 650 ℃ in an Mg-rich environment after the processes of regrinding and pressing.

把直接在650 ℃＜T N，烧结的样品与先在750 ℃下烧结，之后又再次重磨和处理后，并于富镁的环境中在650 ℃下再烧结处理的样品相比较，观察到了MgB2的不可逆的晶体结构转变。

This step is irreversible.(3) Phenyl isopropyl ether is very difficult to oxidize in dark, exhibiting different behavior from isopropyl ether and benzyl isopropyl ether.

3发现苯基异丙醚难以进行暗氧化，与异丙醚和苄基异丙醚醚表现出不同的暗氧化行为。

Pyrolyzing wheat straw for 24h in the range of 300~700℃, the chemical composition of black carbon and the BET specific surface areas were determined; the phenanthrene adsorption and desorption on black carbon were studied, and the greatest irreversible adsorption amount on black carbon was measured.

测定了黑碳化学组成和BET比表面积，研究了菲在黑碳上的吸附与解吸，测定了菲在黑碳上的最大不可逆吸附量。

The major concern during laser irradiation of teeth is the high potential of tissue overheating resulting high temperatures that can spread in toward the dentin,causing irreversible damage to cells presented in the pulp chamber and leading to cell death,so the related laser irradiation parameters should be controlled strictly.

激光辐照牙齿时所产生的温升容易引起牙髓细胞不可逆的损伤，导致牙髓细胞坏死，因此必须对相关的激光参数加以控制。建立了激光与牙齿相互作用的热传输模型，利用Crank-N icolson有限差分法数值模拟了不同Nd∶YAG激光参数照射下牙齿表面及内部的温度场的分布。

A TTI is a small, inexpensive device that show an easily measurable, Time-temperature dependent, irreversible change that can be correlated to quality changes of a food product that undergoes the same temperature distribution.

货架寿命指示器是一种简单便宜的质量监控装置，它能显示一种易测的与时间—温度相关的，不可逆的变化，这种变化能与经历相同温度环境的食品产品的质量相关联，从而提供所监控产品的质量变化信息和剩余货架寿命。

Nowadays, the gentle economic globalization is an irreversible trend of economic development of the world , the different countries in the world are incorporating it in the tide globalized day by day.

经济全球化是当今世界经济发展的必然趋势，世界各国正在日益融入全球化的进程中。

Globalization is an irreversible trend, no country can side-step the cultural changes brought about by international competition and cooperation.

全球化趋势不可逆转，任何国家都不能回避国际竞争和合作所带来的文化上的变革。

Based on the-references on the thermal imidization of polyand the polymer composition analysis,the thermal imidization mechanism of SMA with aniline was demonstrated to be a two-stage consecutive reaction,in which a second-order reversible ring-opening reaction of SMA to produce poly(styrene-co-N-phenyl-maleamic acid)and a first-order irreversible intrachain ring-closing reaction to form SNPMI were involved.

论文首先参考聚酰胺酸热环化反应，并通过SMA酰亚胺化产物的组成分析，确定了SMA与苯胺的热酰亚胺化反应机理为一个包含由SMA生成苯乙烯—N-苯基马来酰胺酸共聚物的二级可逆开环反应以及由SNPMA生成苯乙烯—N-苯基马来酰亚胺共聚物的一级不可逆分子内闭环反应在内的串联反应过程，其中第二步SNPMA闭环反应为控制步骤。

Aim and Methods:To observe the effect of thoracic duct lymph on the blood pressure and obstruction of microcirculation in rat with irreversible hemorrhagic shock by a microscope with TV recorder and the technique of vital observation on mesenteric microcirculation in rats.

目的和方法：应用显微电视录象设备和活体大鼠肠系膜微循环观察技术，观察胸导管淋巴液对重症失血性休克大鼠血压和微循环障碍的影响，以探讨淋巴液的抗休克作用及其机制。

Disparities in syphilis rates are also evident among gay and bisexual men. Of the 11,466 primary and secondary syphilis cases reported in 2007, men who have sex with men accounted for 65%, suggesting that increased transmission of syphilis among MSM is the primary driver of increased overall US rates. In MSM, syphilis can potentiate HIV transmission, and it has been associated with strokes and other irreversible complications, especially in those who are already infected with HIV. Annual or more frequent syphilis screening is recommended by the CDC for all MSM.

梅毒比率在同性恋和双性恋男性中也有差异，2007年的11，466例原发和次发梅毒案例中，男男性行为者占了65%，MSM者的梅毒比率增加是造成美国整体比率增加的主因；MSM者中，梅毒有潜在的HIV传染可能，且此病和中风与其他不可逆并发症有关，特别是那些已经感染HIV者；CDC建议所有MSM者应该每年或者更频繁的梅毒筛检。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。