查询词典 trace

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂液滴连续变形的装置，用此装置可以方便地改变非圆对称谐振腔的几何参数，为ARCs的研究提供了一种有效的实验方法；研究了ARCs中活性模式数和变形参数间的变化规律，激光阈值的数值计算结果和激光辐射的实验结果作了比较，二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因；在由单元化合物构成的微型圆对称谐振腔中，首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号，获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱；在由二元混合物构成的微型圆对称谐振腔中，用染料的激光增益增强了少量化合物的SRS信号，把少量化合物的SRS信号探测浓度降低了近一个数量级，在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索；用石英毛细管形成的稳定液拄构成拄形谐振腔，降低了激光诱导等离子体光谱需要的激励能量，有效地降低了水相样品的痕量元素分析极限，为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

This paper reviews the recent technical developments in the determination of trace bisphenol A in environmental and biological samples including sample separation, enrichment and analytical methods.

文章对近年来国内外环境及生物样品中残留双酚A的最新前处理及检测技术的研究进展进行了综述。

This method had certain practical value in the separation and enrichment of trace bismuth.

该方法在微量铋的分离和富集中有一定的实用价值。

A hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition.

一种二价或三价金属元素，坚硬的银白色铁磁体，植物动物营养中的微量元素。

Silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition.

一种二价或三价金属元素，坚硬的银白色铁磁体，植物动物营养中的微量元素。

Cadmium is a bivalent, non-essential trace element and considered as one of the most phytotoxic heavy-metal contaminants.

本文综述了藻类对重金属的耐性与解毒机理，在此基础上研究了铜绿微囊藻生长和光合作用对Cd浓度增加的响应。

Today, he was suddenly on the attack a "black-faced '", so to speak straight, a trace of unhappiness breeding.

今天，他忽然攻上了个"黑脸'"，说话如此之直，一丝不快滋生。

Today, he was suddenly on theattack a "black-faced '", so to speak straight, a trace ofunhappiness breeding.

今天，他忽然攻上了个"黑脸'"，说话如此之直，一丝不快滋生。

Fourth, it contains turfy soil with organic and trace elements, which formed 1 cm thickness of blackland in every 200-400 years, fostering the rare strategic resource.

正是这与世不同的物候特点，才孕育出举世无双的中国东北寒地黑土这一稀缺的战略资源。

Hence there are sufficient nutritive produces and water supply endowed on the blackland. The lesser Xinq'an mountain is rich in wild specialties, animal dejecta and humus containing, like infusion Chinese medicine, organic and trace elements.

纯净水灌溉：白山黑水之间，山水纯净，水系丰溢，大小兴安岭上丰富的山产品和以野草、野果为食的动物的粪便以及原始森林中多年积累的腐殖质，都富含着有机质和微量元素，这些有机质和微量元素经过雨水浸泡和冲刷，就像熬制好的中药一样，汇集成大大小小的河流，直接注入黑龙江这片平整的黑土地，从而像血管一样，滋润着本就肥得流油的寒地黑土。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了