查询词典 spontaneous emission

Motor vehicle emission has become a major origin of the atmosphere polution.With the increase of the importance to protect the environment,cutting down the motor vehivle emission has become a important target of world's engin development today.

车用发动机的有害排放物是造成大气污染的一个主要来源，随着环境保护问题的重要性日趋增加，降低发动机有害排放物这一目标成为当今世界上发动机发展的一个重要方向。

Wet stack emission will reduce the lifting height of the flue gas, and it's not beneficial to gas diffusion; the momentum of the flue gas should be guaranteed to decrease the plume downwash and to promote gas diffusion; each of the emission index of the wet flue gas can meet the requirements for the environmental protection.

数值计算与分析表明，湿烟囱排放会增强对烟囱的腐蚀性，需采用特殊的防腐处理；湿烟囱直接排放会降低烟气抬升高度，不利于扩散；为减少烟流下洗，增强扩散，应保证烟气的出口动量；湿烟气各项排放指标能满足环保要求。

The near band edge emission of GZO films has a blue shift with the increase of Ga doping concentration because of Burstein-Moss effect. Auger effect became obvious in Ga heavily doped ZnO which led to the quench of NBE emission.

研究表明近带边发射峰的移动主要是由Burstein-Moss效应引起；俄歇效应导致了近带边发射随Ga掺杂的增加产生猝灭现象；用微区应力模型解释了深能级跃迁发射带。

The emission spectrum a harmonically trapped two-level atom driven by a single mode standing-wave field with small Lamb-Dicke parameter is investigated, we discuss the effects of the atomic c.m. motion on the emission spectrum.

本文研究了在Lamb-Dicke参数较小的情况下单模驻波光场驱动的俘获二能级原子发射谱，讨论了原子质心运动对原子发射谱的影响。

Our calculated result shows that, except for the fluorescence emission, there coexists a Cerenkov line-like radiation mechanism in AGNs, which gives a significant contribution to the iron K-line emission, even moderately higher than the former.

两者共存于活动星系核中，而且以Cerenkov辐射机制为主。

All growth is a leap in the dark, a spontaneous unpremeditated act without the benefit of experience.

Henry Miller 所有的增长是一个在黑暗中，一个自发的没有经验中获益过失行为的飞跃。

This article presents a new teaching system,which turns the teaching aim of controlling or forcing learning to spontaneous learning.

建立基于网络的教学支撑平台，特别是基于Web的教学辅助系统，为学生的学习提供了认知、交流及协作的管理工具。

It was found that the mean spontaneous and induced chromosome aberration and expression of fragile sites were

因此染色体脆性表达的增多在Alzheimer病的发生中可能起着一定的作用。

The terms "biogenesis"(for life only from pre-existing life) and "abiogenesis"(for life from nonliving materials, what had previously been called spontaneous generation) as used by Huxley in this speech have become the standard terms for discussing the subject of how life originates.

赫胥黎在这篇演讲中所使用的生源说（生命从已存在的生命体演变而来）和自然发生说这两个术语已经成为讨论生命如何起源时的标准术语。

For suspected cases, in early pregnancy (8-12 weeks), chorionicvilluscell karyotype analysis was done in those with spontaneous natural abortion; in the midtrimester (13-24 weeks) and the late pregnancy (over 25 weeks), the abortus or newborn blood was collected for chromosome analysis.

对有胎儿异常可能的病例，孕早期(8～12周)自然流产者行绒毛细胞核型分析，孕中期(13～24周)及晚期(25周以上)取流产儿和新生儿血进行染色体分析。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。