This work was followed by worldwide research aimed at improving understanding of the theory of stimulated emission in semiconductors . 各国相继进行广泛研究，以进一步探讨半导体中的受激发射理论。
The emission observed while holding at the proof load provides another piece of information regarding the imminence of failure . 在验证载荷施加期间，检测声发射还能额外地提供有关破坏临近程度的信息。
The availability of new passenger cars each year depends on whether car makers successfully complete an emission certification process . 每年新车是否可用，取决于汽车制造者是否成功地完成排放物鉴定程序。
All automobile engines now built are equipped with the positive-crankcase ventilation system of crankcase emission control . 所有现代制造的汽车发动机，都需要装备控制曲轴箱有害污染的曲轴箱强制通风系统。
It is assumed that the emission and absorption of light energy by an atom or molecule is not a continuous process but occurs in steps . 假定原子或分子发射光能和吸收光只能不是一个连续的过程，而是阶梯式发生的。
The justification of(13. 2-2)as a representation of spontaneous emission noise is provided by the discussion preceding(13. 1-7) . 根据上面对式（131-7）的讨论，就可以将公式（132-2）看作是自发辐射噪声的表达式。
Whatever the wavelength of the radiation we study, we are still looking principally for those telltale emission and absorption . 不论我们研究的辐射具有什么样的波长，我们始终以那些泄露天机的发射线与吸收线为主要寻找对象。
The stationary sources of emission include fuel consumption in power plants; industrial, commercial, and domestic heating; and solvent emissions . 散发的固定来源包括动力厂燃料的燃烧；工业，商业和家庭加热；以及溶剂散发物。
In 1961, auto manufacturers began installing crankcase emission control system on cars built for registration in california . 早在1961年，汽车制造厂商便开始在汽车制造时安装曲轴箱有害污染控制系统，并在美国加利福尼亚州注册。
