双位置

Blue-light-emitting polyfluorene derivatives with bulky bipolar pendent groups at C-9 position has been synthesized. The combination of electron-deficient oxadiazole and electron-rich triphenylamine affords a highly efficient light-emitting material by improving charge injection and transport in electroluminescent device.

具有刚硬双极性侧链的高效率蓝光聚茀高分子材料已成功被合成，藉由在fluorene的9号碳位置导入了有利於传输电子的oxdiazole片段与利於传输电洞的triphenylamine片段所结合的TPAOXD，不仅增加电荷注入与传输能力，同时提高材料的热稳定性质(Tg： 186 oC)。

It is very difficult to get any suitable result on the basis of genus, or higher taxon in studying Jurassic bivalve palaeobiogeography.

聚类分析结果以及对控制藏北、藏南和印度侏罗纪双壳类动物群分布因素的分析表明，侏罗纪时，藏南地块的位置更靠近藏北地区，而距印度次大陆较远，与前人认识不同。

Results There were significant differences between one-phase and two-phase treatment, we found the more mandible growth in two-phase treatment, and more dental compensation in one phase-treatment, such as retractive upper incisiors and procline of lower teeth.

结果：两组患者治疗后的颌面形态以及牙齿的角度和位置均有明显不同，即双期治疗组患者下颌骨有明显生长，单一使用固定正畸治疗患者，上前牙较直立，下切牙较唇倾。

Cunkou refers to obvious pulsative place of the radial artery on both sides of the wrist, and is divided into three regions: cun, guan and chi, which, on the left hand, reflect respectively the conditions of the heart, liver and kidney and, on the right hand, the conditions of the lung, the spleen, the stomach and the kidney.

寸口指的是双侧腕部桡动脉明显搏动的位置，可以分为三个区域：寸、关、尺，左手单独反应的是心、肝、肾的状况，右手反应的是肺、脾胃和肾的状况。

The comparison of petrology, lithofacies, petro-geochemistry and tectonic environment of the rapakivi granite both from Qinling-Kunlun and world shows that the rapakivi granite has same or consistent characteristics: rapakivi structure, sub-aluminous, high-potassic, alkali-rich magma, two-peak magma assemblage and formed in post-collision environment. However, there are some certain differences in some geochemical index, forming age of magma, and geotectonic position of outcropping.

通过秦岭－昆仑造山带中的环斑花岗岩同世界元古宙环斑花岗岩的岩石学、岩相学、岩石地球化学和构造环境等方面的对比研究发现，二者具有相同或一致的特征：具环斑结构，属准铝、高钾、富碱岩浆，具双峰式岩浆组合，形成于后碰撞环境，但其地球化学的某些指标、岩浆形成时代和出露的大地构造位置等有一定差异。

In the design of the road test, a reflectional infrared sensors is used to detect the black line on the road to judge the trolley's position; on trolley's speed controlling, the control system uses PWM technology to control the rotational speed of electric motors, and complete the speed real-time control to electric cars in d

在路面检测设计中，小车采用反射式红外传感器来检测其行驶路面上的黑线，以判断小车行驶的位置；在控制小车行驶速度上，系统利用PWM技术控制电动机的转速，通过程序完成对电动小汽车在不同路段的行驶速度实时控制；最后采用双电源供电，用以保证系统的运行更加稳定，可靠。

The results indicate that the model has certain prediction ability for stratiform precipitation.

利用MM5中增加的双参数显式云物理方案模拟了西北地区一次层状云降水过程，模拟结果显示对小雨的预报评分较高，对中雨以上评分低而且位置有一定偏差，即对层状云降水模拟效果较好。

"Tong_su_yi_xu synonymic words" is to say those two double-syllable composite words which have the same or the similar meaning (according to the meanings in "Modern Chinese Dictionary")and the same morphemes but different order.

&同素异序同义词&是指构词语素相同，语素位置互逆，词语的概念意义相同或者相近(主要依据《现代汉语词典》中对词语的释义)的成对出现的双音节合成词。

In the results of the optical properties, these molecular monomers have different HOMO and LUMO energy gap such that there are dual-emission and energy transfer mechanism in solution fluorescence spectrum. In the study of the electrochemical properties, various of triphenylamine derivaties have different oxygen binding site and they make elecropolymerization happen or not. In the applications of the hole-transport materials, the performance of compound 21 is better than other compounds. The electropolymerized-film may have residual cation molecules so they can increase the concentration of hole-transport. Due to this reason , compound 21 is suitable to become hole-transport materials.

在光学研究方面，由於目标化合物内单体的HOMO及LUMO能阶差异，使得在溶液萤光放射上有双发射及能量转移的情形发生；在电化学研究方面，不同的三苯胺衍生物由於氧基的位置不同，使得取代基在间位的化合物有不错的电聚合效果；而元件的应用上，具有咔唑基团的化合物21由於在形成电聚薄膜后，可能有残余的阳离子态化合物，使得电聚薄膜内的电洞数浓度较高，因此与其他元件相比之下，有较低的启动电压和不错的元件效率。

Testicular descent can get arrested at any point from the renal hilum to the external inguinal ring. Of all the undescended testes, 90% to 95% are low and in the inguinal canal.

双睾丸下降过程中可于肾门至腹股沟外环的任一点受到阻止，所有的隐睾中，90％－95％的位置较低，位于腹股沟管内。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。