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In the optical-fiber channel, amplified spontaneous emission noise in the optical amplifier is the major source of noise.

在远程光纤信道中，放大器自发辐射噪声是主要噪声源。

This character of the photonic crystal containing defect can be used to enhance spontaneous emission of atoms and to make narrow band filter.

光子晶体缺陷的这一性质具有很重要的实际用途，如增强原子的自发辐射、制作极窄带的选频滤波器等。

When we get the results of increasing spontaneous emission rate and optical transmission, we expand the metal structure domain to fit the real situation.

得到提升光源的发光效率和光穿透率的结果后，我们扩大金属结构范围来接近实际的情况。

The spontaneous emission of a four-level atom embedded in a one-dimensional photonic crystal is investigated.

本文研究了处于各向同性的一维光子晶体中的单个四能级原子的自发发射性质。

The system consists of an amplified spontaneous emission broadband light source, a photo detector and the signal processing subsystem.

该系统包括一个放大的自发辐射的宽带光源，光电检测器和信号处理子系统。

In the range of pH 5 10 5, SSA gives a strong and steady fluorescence with a maximum emission wavelength at 402 nm and excitation wavelengths at 212, 238 and 297 nm, respectively.

在近中性条件下，SSA稀溶液的荧光强度与浓度之间存在良好的线性关系，线性范围为 5～ 2 5 0ng·mL- 1 ，检测下限为 5ng·mL- 1 。

Based on the summary of enacted and implemented quality criteria and emission criteria in the system of EC atmosphere environment standard, the implementation procedures and requirements to member states and characteristics of EC atmosphere environment standard directive s are analysed, and some suggestion for formulating and implementing Chinese atmosphere environment standard is also proposed.

在概述欧盟已颁布实施的大气环境标准体系中的质量标准和污染物排放标准的基础上，分析了欧盟环境标准指令在成员国内的实施程序与要求以及欧盟大气环境标准的特点，并对我国大气环境标准的制定与实施提出了建议。

The Chandra data show the shape and extent of the high-energy emission in the central region. By studying W28 and others like it, astronomers hope to better understand the complexities involved when a star explodes in a crowded neighborhood.

钱德拉的数据同时也展现了中心高能发射物形状和程度，通过研究W82和其类似天体，天文学家希望能更好的理解当一颗处于拥挤环境中的恒星爆炸时的复杂性

Caption:: This gigantic emission nebula surrounding the blue reflection nebula NGC 6914 is still an active star forming region.

巨型的发射星云所包围著的反射星云NGC 6914也是一个活跃的恒星诞生地。

This debris forms a bipolar shell around the star, which lies near the brightest point of the optical emission.

这个琐屑形成了围绕恒星带有两极的壳，位于最明亮的光发射点附近。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。