性选择的

Cervical factor infertility is suggested whenwelltimed PCTs are consistently abnormal in the presence of anormal semen analysis.

如果时间选择合适的性交后试验持续异常而精液分析正常时就要考虑宫颈因素引起的不孕。

Darwin continued to publish more works, including his The Descent of Man (1871), in which he applied his theory of evolution to humans, implying that they had descended from apelike creatures.

此后他还出版了许多著作，包括1871年出版的《人类起源及性的选择》一书，在该书中他把进化论用于人类，暗示着人类起源于猿类生物。

Making use of this reaction, thirteen methyl 2-arylamino-2-deoxy 3-keto glucopyranosides (5～17) with different substituted arylamino groups and two

选择不同类型的芳胺利用该反应合成了一系列共十三种2-脱氧2-芳胺基3-位氧化α-甲基D-葡萄糖苷（5～17），该类化合物为重要的手性合成子。

In this study, we developed the ammonia sensing material by using MCM-41 impregnated with bromocresol green. MCM-41 is one kind of mesoporous molecular sieves. It can be applied to many fields due to well-defined pore shapes, narrow distribution of pore sizes, large pore volumes, high surface area, excellent thermal, hydrothermal, chemical and mechanical stability. And the bromocresol green dye is commonly used as a pH indicator with colorimetric from pH 3.8 to pH 5.4.

本研究之目的是结合变色染剂及中孔洞分子筛MCM-41进行氨气吸附，研究中所选择之变色染剂溴甲酚绿是一种偏酸性之大分子有机染剂，其变色范围在pH 3.8到pH 5.4；而MCM-41由於其孔洞大小分布范围狭窄、孔洞体积大、高比表面积、具有良好的吸附容积、表面反应性强及易於改质等优点，故期望利用此复合材料，经气体吸附达到氨的移除并同时在吸附饱和前能产生显色效果。

The Teflon cell contains a pH sensitive indicator-buffer solution consisting of bromothymol blue and sodium carbonate.

更多作为C02选择透过性膜，该液芯波导管同时也是传感器的比色池，我们采用溴百里酚蓝和碳酸钠(Na2CO3)溶液为主要成份的pH敏感指示剂作为缓冲溶液。

Surface seawater samples are pumped into a PVC tube enclosing an inner Teflon AF tube, which served as a long pathlength gas-permeable liquid-core waveguide for spectrophotometry. The Teflon cell contains a pH sensitive indicator-buffer solution consisting of bromothymol blue and sodium carbonate.

该传感器采用Teflon AF 2400液芯波导管作为C02选择透过性膜，该液芯波导管同时也是传感器的比色池，我们采用溴百里酚蓝和碳酸钠(Na_2CO_3)溶液为主要成份的pH敏感指示剂作为缓冲溶液。

The composition designs and performances of LOVA propellants are investigated on the basis of thorough analysis of constraints of caseless gun bullet system to propellant performance under the program of caseless ammunitions.

论文选择无壳枪弹为应用背景，分析了该系统对发射药性能的约束条件，进行了低易损性发射药的基础配方设计和性能研究。

objective to set up mode of management,prevention and cure on epilepsy among rural population in ningxia by primary medical care system,then extend toward others rural regions.methods doctors in county,countryside and villege level were trained how to screen,diagnose,prevention and treat epilepsy among 140 countrysides and 3,786 thousand rural populations in ningxia.cluster sampling was adopted to screen convulsibility epileptics,to freely treat with pb.

目的 建立宁夏农村地区癫痫的防治和管理有效模式，并逐步向其它农村地区推广。方法采取整群抽样方法，选择宁夏农村地区140个乡，共计378.6万人群。通过对县、乡、村医生的专业培训，筛选惊厥性癫痫患者，采用苯巴比妥单药免费治疗，分别在第3、6、9和12个月对其疗效进行评估。结果培训了172名县、乡、村医生。

However, enteroclysis is still valuable for detection of small bowel stricture and tumor, and may be a useful screening alternative for subsequent procedure selection.

小肠钡灌对肠腔狭窄和小肠肿瘤仍是一项较有价值的检查方法，同时可作为选择后续检查方法的筛选性手段。

OBJECTIVE:The writer inquires into the principle of diagnosis and treatment,how to select decontamination of intestine,ie.relation between decontamination of intestine and enterogenous infection,etc.by analysing the information on 67 cases of bleeding of inflammatory large intestine.

目的：通过对67例大肠炎症性出血病例资料的分析，探讨其诊治原则，如何选择肠道去污染，即与肠源性感染间的关系等问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。