选择性

This paper expatiated the concept, history and actuality of biotope mapping, and introduced the method and model for mapping of biotope in German biotope mapping.

本文阐述了生态单元制图的概念，以及国外历史及现状，详细介绍了德国生态单元制图的方法和程序，并建议将其有选择性的运用到我国西部生态环境保护中。

Furthermore, the selective reductions of 2,2'-dinitrobiphenyl have been detailedstudied in the synthesis of achiral biphenyl backbones.

运用不对称活化的策略，成功地在Cu催化Et_2Zn对链烯酮的1，4-共轭加成反应中获得了高对映体选择性的加成产物。

The method was used for the determination of proteins in human serum samples with good stability and high selectivity and the results obtained were in good agreement with those obtained by biuret spectrophotometric method

该方法的稳定性好、选择性高，直接用于人血清试样中总蛋白含量的测定，实验结果与常用的双缩脲法基本一致。

The method has been applied to the determination of protein in human serum. The results obtained agreed quite well with those obtained by Biuret method.

该法灵敏度高，选择性好，用于实际血清样品总蛋白的测定，与双缩脲法相关性良好。

Third, sodium sulfoxylate formaldehyde is a kind of bleaching powder used in industry, which is prohibited from adding to food. In this part, we take it as an object to study, by using ion chromatography instrument which is equipped with autech DS-PLUS?

本章利用荧光光度法和紫外吸收分光光度法研究了核酸对环丙沙星-Tb~(3+)体系的荧光增强效应及其影响因素，探讨了其作用机理，提出了环丙沙星-Tb~(3+)配合物与核酸的作用模型，并建立了DNA的选择性测定方法，并将其运用于合成样与血清中DNA含量的测定。

F1 submachine gun is blowback operated, selective fired weapon which fires from open bolt.

F1的冲锋枪是反作用经营，选择性发射武器的开放螺栓的火灾。

In order to study cecropin from Bombyx mori at molecular level, first, a cecropin gene was synthesized and expressed in E.

基于它的这种选择性效应和分子小、无抗原性等特点，可望成为新一代的抗菌、抗肿瘤药物。

Critics say the policy has led to forced a bort ions and a dangerously imbalanced sex ratio due to a traditional preference for male heirs, which has prompted countless families to a bort female fetuses in hopes of getting boys.

批评人士认为，计划生育政策使很多具有"重男轻女"传统思想的家庭进行了选择性人工堕胎，由此造成了我国男女比例的严重失调。

In this paper, principle and technique of volume holographic storage are presented such as volume grating formation, Bragg diffraction, and horizontal angle selectivity.

本论文介绍了体全息存储原理及技术，包括体光栅的形成和布拉格衍射、衍射效率、水平角度选择性，还介绍了相干光学信息处理系统、Vander Lugt 滤波器的形成过程，给出了多重匹配滤波器相关的运算过程，最后介绍了子波变换的定义以及光学子波变换。

The impact of the thickness of volume H-PDLC grating on the wavelength selectivity of Bragg diffraction are simulated numerically, as well as the theoretic relationships among the refractive index modulation, spatial frequency and the H-PDLC diffraction efficiency.

计算机模拟了体光栅厚度对于布拉格衍射波长选择性的影响，以及折射率调制深度、空间频率和H-PDLC光栅衍射效率的关系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。