反转

This paper reviews the conventional models for the formation of marginal compositional reversals,including wall-rock contamination,multiple injection,compositional stratification of magma,high degree of supercooling,crystal settling of phenocrysts,flow differentiation,compositional convection and upward decrease in amount of intercumulus liquid.

朱丹，罗泰义，宋谢炎，徐义刚，陶琰，黄智龙，基性-超基性岩浆成岩和成矿过程中Soret效应的研究进展综述了当前对基性-超基性岩床和层状岩体的边缘反转现象的传统解释模型，包括围岩混染、岩浆多期注入、岩浆分层、过冷却、晶体沉降、流动分异、结晶和成分对流以及逐渐减少的颗粒间熔体量。

To explore the function of PDE in canine central nerve , gene expression of 18 PDE subtypes in different fractions of canine central nerve (cerebrum,cerebellum,myelencephalon and spinal cord) were detected by RT-PCR,and PDE activity was calculated by the content changes of cyclic nucleotides before and after the PDE reaction examined by high performance liquid chromatography.

为探明磷酸二酯酶(phosphodiesterase，PDE)在犬中枢神经活动中的作用，采用反转录聚合酶链反应检测18个PDE亚型在犬中枢神经不同部位中(大脑、小脑、延髓和脊髓各段)的表达分布，以高效液相色谱法检测环核苷酸在酶反应前后的含量变化，计算PDE活性。

GBE model overcomes the problem of positive and negative parity reversal in OGE.

GBE模型克服了OGE模型中的正反宇称反转问题。

The reference and echo signal were separately measured when the hard target was still, in positive rotation and negative rotation.

利用配合目标静止时测得参考信号与回波信号的关系可得参考信号的角度矫正因子为1.1949，使用该矫正因子测得硬目标在正转和反转时转速与真实转速之间的误差小于

Desige Parameter and test date of the remoulded cylineer shaped screw impeller used by inducer was introduced, which fully reached positive and negative rotation performance and accorded with conversion law.

介绍了用诱导轮改造后的圆柱形螺旋叶轮的设计参数和试验数据，改造后的叶轮不仅能达到正、反转性能要求，而且基本符合相似换算定律。

Fig. 4 Measurement data abo ut echo signal f rom hard target and reference when t he hard target is still , in po sitive , negative rotation c

图 4 是为了矫正参考信号与回波信号入射到法 790 光学学报 28 卷图 4 配合目标静止，正转和反转时回波信号与参考信号的测量数据

BLDCM ; Logic layout ; Positive and negative rotation control ; Magnetometive forec ; Postition sensor

无刷直流电动机；逻辑编排；正反转控制；磁势；位置传感器

The method is based on real time reverse-transcription-PCR amplification of mRNA to detect viable Listeria monocytogenes by specific hlyA gene. This method can overcome the false-positive caused by amplification of nonviable Listeria monocytogenes in the detection process.

为克服传统PCR检测的假阳性问题，有效的检测单增李斯特活菌，本研究提取单增李斯特菌的总RNA并进行反转录，以单增李斯特菌的必要毒力基因hlyA为靶基因，设计特异性引物和TaqMan探针进行实时PCR检测，研究了检测的特异性和灵敏度，考查了对人工污染牛乳进行检测的应用性。

There are ominous signs of a downturn in Britain, too.

在英国，房价也出现了反转的征兆。

In recent years, as an important aspect of the research of basin and orogen, inversion tectonics is increasingly significant in the field of oil and gas exploration.

近年来反转构造作为盆地和造山带研究的一个重要方面，在油气勘探领域中的重要作用也日趋显著。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。