选择性的

If a mother's stress adversely affects the development of her fetus then selectively aborting boys, rather than wasting time and resources on bringing them to term, would make evolutionary sense.

如果母亲所受的压力对胎儿的发育有相反的作用甚至选择性的流产男婴，而不是使得孕妇浪费时间和资源将他们抚养成人。这将极具进化学意义。

In addition, the compound of the invention having the antagonism to both receptors showed a better pharmacological action compared to the case where an antagonist selective to one of the receptors was solely used.

此外，对两种受体具有拮抗活性的本发明化合物显示出比单独使用对其中一种受体具有选择性的拮抗药的情况更好的药理作用。

A generalized mathematical model was developed to describe the distribution of over-potential.Dimensionless variables μ and ω that characterize the polarization and influence of side electrode reaction in the system,were derived from modeling.Adomian's decomposition methodADM）was used to solve the nonlinear differential equation of the model to obtain an approximate analytical solution,which was in the form of algebraic expressions of infinite power series.By the solution,the relationship between over-potential distribution and average selectivity could be easily calculated without solving the nonlinear model time and again.

建立了描述超电势分布的普遍化数学模型，归纳出表征电极极化和副反应影响的量纲1数μ和ω，并用ADM（Adomian's decomposition method）对该非线性微分方程模型求解；所获得的逼近解代数表达式，可方便地计算不同参数下超电势分布对平均选择性的影响，而毋需反复求解模型微分方程。

It was found that this polymeric arsine palladium(0) complex is a highly active and stereoselective catalyst for arylation of styrene or acrylic acid.

通过用水合肼对上述聚硅氧烷负载的单齿胂钯配合物进行还原制备了聚硅氧烷负载的单齿胂钯(0)配合物，研究表明它是苯乙烯、丙烯酸芳基化反应的高活性和高立体选择性的催化剂。

Part 4. The effect of cyclodextrins on the carboxylation of 3H2NA was studiedby HPLC and ESI-MS.

在前面工作的基础上用高效液相色谱和色-质联用进一步研究了环糊精对3H2NA的羧酸化反应的影响，旨在探索提高3H2NA及其类似物反应选择性的一种途径。

Because this mode of metastasis severely affects the prognosis of cancer patients (median survival 5-6 months), colorectal peritoneal carcinomatosis has previously been considered a pre-terminal condition suitable for palliative treatment.

虽然近来有报告指出，若选择性的使用减缩手术和腹腔内化学治疗，可以增加病人的存活率，但其术后的高并发症发生率（22.9%）和致死率（4%）无形中也限制了这项治疗方法的使用空间。

Here we applied many types of cinchona alkaloid derivatives and otherβ-aminoalchohol compounds in IFB reactions and investigated the effects of solvent, temperature and catalyst amount on the enantioselectivities in order to find the proper catalyst and optimize reaction condition.

本文考察了多种金鸡纳生物碱衍生物及其它一些β-氨基醇类化合物在IFB反应中的应用，并研究了催化剂的结构、溶剂效应、温度、催化剂用量及反应底物类型对立体选择性的影响，以筛选适合的催化剂和优化反应条件。

Atomic force microscopy is used to examine the surface morphology of the 3-monolayer InAs. It's found that the evolution of surface morphology with increasing the GaAsSb thickness can be classified into 3 stages: random distribution of InAs quantum dots, space-selective growth of InAs quantum dots on cross-hatching surface, and purely cross-hatching surface.

最后，由原子力显微镜分析，让我们观察到样品表面的InAs奈米结构的分布型态：(1)随机分布，(2)在田埂状(cross-hatching)的表面上选择性的成长，(3)奈米结构渐渐地消失，最后仅剩田埂状的表面型态。

Herein, we report the enantioselective total syntheses of slagenins A-C and their antipodes. Starting from readily available ethyl -4-chloro-3-hydroxy-butanonate, elongation of the carbon chain with diazomethane, followed by oxidation of the given α-diazoketone using distilled DMD, afforded a key intermediate α-ketoaldehyde .

本文从方便易得的-4-氯-3-羟基-丁酸乙酯出发，经重氮甲烷延伸碳连、DMD氧化相应的α-重氮酮，制得α-酮醛；该化合物与尿素在氢氟酸作用下，以协同方式非对映选择性的直接构建了cis-四氢呋喃并[2，3-d]咪唑啉-2-酮双环结构，进而合成了天然产物slagenins A、B、和C的对映体。

CLT is selectively implemented in CET according to students'needs instead of dogmatically transplanted just because it's in fashion.

对交际法教学的应用应该是有选择性的，建立在学生需求基础上的而不是教条地照搬流行的模式。

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％。