查询词典 alder

Objective To explore the effect of exercise on the physical and mental health alder population.

目的 探讨健身锻炼对老年人生理及心理健康的影响。

In the battle of the trees, the Alder fought in the very front line.

在树木的战役中赤杨战斗在第一线。

A total of 48 genotype Frankia strains were identified from the nodule samples of 113 individual alder trees.

从113株赤杨的根瘤样品中共检测到48种基因型的Frankia菌株。

TREES ALDER The Alder is the tree of fire.

赤杨： 赤杨是火的树木。

The wood properties of alder is similar to that of poplar and birch which could be used to produce different kinds of pulp.The paper is a review about pulp production potential and status of pulping/paper-making and research on wood property of alder in the world.

桤木是一种商用种植较有发展前景的阔叶树种，生长迅速、固氮能力强，木材性质类似于杨木和桦木，可用来开发研制不同的浆种，与针叶木浆或其它阔叶木浆配抄可以生产高质量的印刷纸和书写纸等。

In the first chapter, two reviews on the synthesis of nitrogen compounds fromcarbohydrates and the synthesis of pyridines by Diels-Alder reaction were introducedrespectively.

第一章简要介绍了以碳水化合物为原料合成含氮杂环化合物的研究进展和以Diels-Alder反应合成吡啶类化合物的研究进展，确定了本论文的研究课题。

The Research about the Synthesis of Phenylsulfonyl α,β-unsaturated Ketones and Their Applications in Asymmetric Diels-Alder Reaction Catalyzed by Lewis Acid and Chiral Titanium Reagents.

苯磺酰基取代的α，β-不饱和酮的合成及其在不对称催化Diels-Alder反应中的研究

Chiral amine-protonic acids are highly efficient and excellent enantioselective organocatalysts developed in recent years. They have been successfully applied to a number of enantioselective organic reactions, such as asymmetric aldol condenstion, Michael addition, Diels-Alder cycloaddition, Strecker reaction and so on.

手性胺-质子酸是近年来发展起来的新型高效、高对映选择性的有机催化体系，已成功应用于催化不对称Aldol反应、Michael加成反应、Diels-Alder反应和Strecker反应等许多重要的有机合成反应。

Theoretical Study on the Reaction Mechanism for Diels-Alder Cycloaddition of C50 D(subscript 5h) with 1, 3-Butadiene and 2, 3-Disubstituted 1, 3-Butadienes

篇名 C50D(下标 5h与1，3-丁二烯及2， 3-二取代的1， 3-丁二烯的Diels-Alder环加成反应机理的理论研究

Density functional theory calculations at the B3LYP/6-31G level of theory were employed to study the mechanism and the potential energy surface of Diels-Alder reactions between Lewis base stabilized borabenzene and dienophiles.

采用密度泛函理论方法在B3LYP/6-31G水平上研究了Lewis碱稳定的硼代苯与一些亲二烯体的两种可能的Diels-Alder反应的微观机理和势能剖面，并研究了反应的溶剂效应和取代基效应。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。