手

The hand looked chapped and wizened, not a boy's.

那手看上去粗糙干瘪，不像是个男孩的手。

I have passed my hands over a plaster cast of Michelangelo's inspiring_and_heroic Moses; I have sensed the power of Rodin; I have been awed by the devoted spirit of Gothic wood carving.

我的手依依不舍地留恋罗马及后期的逼真的大理石雕刻，我的手抚摸遍了米开朗基罗的感人的英勇的摩西石雕像，我感知到罗丹的力量，我敬畏哥特人对于木刻的虔诚。

My hands have lingered upon the living marble of roman sculpture as well as that of later generations.I have passed my hands over a plaster cast of Michelangelo's inspiring and heroic Moses;I have sensed the power of Rodin;I have been awed by the devoted spirit of Gothic wood carving.

我的手曾逗留在罗马时代以及更晚期的那些栩栩如生的大理石雕塑上，我的手曾经抚摸过米开朗基罗那激动人心的石膏像英雄摩西，我也能感知到罗丹的才能，对哥特式木刻的奉献精神深感敬佩。

I heard Glenn Yarborough, a popular sixties folksinger; the great jazz organist Jimmy Smith; and a now forgotten group called the Mugwumps, who broke up shortly after I came to Georgetown.

我听过60年代很受欢迎的民歌手格兰。亚伯勒的演唱，还有伟大的爵士风琴手吉米。史密斯，以及现在已被人遗忘的"酋长"乐队。他们在我到乔治敦后不久便散了伙。

Started from D-tyrosine, we obtained the tetramic acid 96 using Jouin reaction. The assembly of the second fragment 109 was stared from 1,4-butandiol,using asymmetric alkylation reaction developed by Oppolzer as a key step. Coupling of the tetramic acid 96 with 109 provided the key intermediate 110 according to Yoshii\'s procedure. After remove protective group and Sharpless epoxidation, we obtained the key intermediate 113. Its macrocyclization to form the final product is in progress.

本论文的第二章主要对Macrocidin A开展了合成工作，我们从D构型的酪氨酸出发，经过官能团转换；利用Jouin反应生成Tetramic acid 96，另外一个片断从1，4-丁二醇开始经过多步反应生成碘化物104，利用Oppolzer发展的手性樟脑磺酰胺为辅基参与的不对称烷基化反应，引入手性甲基，生成关键中间体109，接着通过Yoshii发展的方法连接96和109生成110，经过Sharpless不对称环氧化反应建立环氧化合物，然后脱去保护基得到关环前体113，分子内的Mitsunobu反应进行关大环反应正在进行之中。

The E-TOF will also be feasible and practical to assist chemists in screening the optimal reaction condition or evaluating the overall efficiency of different catalytic systems for a specific asymmetric reaction.4.For the first time,we explored chiralγ-hydroxy-α,β-acetylenic esters,which were prepared via asymmetric alkynylation,as key intermediates to the synthesis of chiralγ-butyrolactones. This convergent and enantioselective approach to chiralγ-butyrolactones is practical and easily handled with protecting group free.

这一概念包括反应产率、对映选择性、配体用量以及反应时间四个重要反应参数，不仅适用同一反应不同催化体系的横向综合性评价，而且适用于某一特定反应催化体系的优化过程，有助于研究人员选择最佳的反应条件。4、我们发展了以手性γ-羟基-α，β-炔酸酯为关键中间体完成了手性γ-丁内酯类天然产物的对映立体选择性全合成，该关键中间体能够以我们的催化体系方便的对映选择性合成，之后的官能团转换方法成熟，易于操作，无需进行繁琐的官能团保护和脱保护过程，绿色经济。

The internal coordination of cluster of enterprises is not only different from the invisible hand of the price mechanism that exists in the market,but it is not the same as the visible hand such as administerial order that exists in enterprise.

企业集群内部协调既不同于市场上价格机制的无形之手，又不同于企业内部行政命令的有形之手。

The longer fluorinatd alkyl chain on the three-ring was advantageous to the formation of smectic phase. The mesogens with chiral center located between fluorinated tail and mesogenic core exhibited chiral smectic C phase and other smectic phases when the alkoxyl adhering to the other side of the mesogenic core was of intermediate length.

三环系液晶化合物中较长的氟烷基边链有利于近晶相的形成，且当液晶核另一端的烷氧基链的长度适中时，在氟烷基边链和液晶核之间具有手性中心的液晶分子显示了手性近晶C相和其它液晶相。

The asymmetric allylation of aldehydes is one of the most important methods for preparation of chiral homoallylic alcohol, which is the building block in organic synthesis of fine chemistry and drugs.

手性烯丙基醇是一类重要医药中间体，合成手性烯丙基醇的常见方法是醛的不对称烯丙基化反应。

In chapter four, the chiral recognition properties of one chiral calix [4] crown ether toward amygdalic acid and dibenzoyl-tartaric acid were studied by 〓H NMR,〓C NMR and UV-vis spectroscopy.

研究结果表明，手性杯[4]氮杂冠醚对二者均有一定的手性识别能力，并发现针对不同的客体，主体以不同的构象与之相互作用，证实分子识别过程中存在构象的变化。

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％。