负

Positive frequencies are produced by anticlockwise rotation and negative frequencies by clockwise rotation.

正频率是用逆时针旋转来产生，而负频率是用顺时针旋转来产生。

But now, you are applying an upward force and the displacement is downward, making the vectors antiparallel.

而距离仍然小时，但现在，你要申请一个向上的力和位移向下，使反平行向量。这给你负你做工作。同样，重力所做的工作，现在是积极的，因为它适用的力量向下，并且也向下位移。

So the Poynting vector and wave vector are antiparallel, consequently, the light is refracted negatively, and also there are many other unusual behaviors in LHM like reverse Cerenkov radiation, contrary Doppler effect etc.

所以近年来有关左手材料的研究受到了广泛的关注。2002年，科学家们发现当光波以一定角度入射到在光子晶体界面上时，光波在光子晶体中的传输也会出现和在左手材料中相同的现象：比如负折射和超透镜现象。

It is found that:(1) the variation of dFM may lead to two different features for the IEC,one is the oscillatory behavior of IEC with the spacer thickness,the other is the exponential behavior in the most spacer thickness.(2)As a oscillatory function of dFM ,the IEC exhibits multiple periods and a negative non-oscillatory term.(3)The Fermi energy of the conduction electrons has a little variation as the magnetization of the two FMs changes from parallel to antiparallel alignment,furthermore,this variation is correlated with the IEC to some extent.

结果发现：（1）dFM的变化会导致层间交换耦合出现两种不同的特征，一种是随着中间层厚度的增加，IEC有振荡行为；另一种是其指数衰减行为；（2）作为dFM的振荡函数，IEC表现出多个周期和一个负的非振荡项；（3）传导电子的费密能会随着两铁磁体的磁化排列变化而稍有变化，进一步地，这种变化与IEC有着某种程度的关联。

Trace element exhibits enrichment of LREE and antipathic elements. Trace element spidergram of obvious right deviation and extremely high containing of Sr, Zr and Hf are different from the negative anomaly of dunite which lies the bottom of ophiolite, but has weak positive anomaly.

微量元素显示LREE和不相容元素的富集，右倾的微量元素分布模式，异常高的Sr含量，Zr、Hf不同于蛇绿岩底部纯橄榄岩的负异常，而显示出微弱正异常，这些特征都与经典蛇绿岩层序底部的地幔橄榄岩不同。

A special antisymmetric structure is proposed, and based on it, the direct design method is given to design the anti-synchronization controller. To prevent the controller design by active control method from indiscrimination, a simplified judging method of negative definite matrix is introduced to give the anti-synchronization active design of controller.

提出了一种特殊反对称结构，基于此给出了反同步控制器的直接构造法；针对主动控制法设计控制器的盲目性，引入了判定矩阵负定的简化方法，给出了实现反同步的主动控制法。

Atthe same time,the changes of blood plasma antithrombin AT-Ⅲwere monitored.

结果创伤性休克大鼠血浆AT-Ⅲ与中性粒细胞选择素-L表达呈负相关。

After flare opening stage apeak distribution of dry weight root in soil was Negative Index curve.

大喇叭口期以后根系干重在土壤中的垂直分布呈负指数曲线趋势变化。

Fungal infection was positively related to temperature and rainfall significantly, but negatively related to aphid density.

结果显示：麦蚜真菌病的发生水平与温度和降雨量成显著的正相关关系，与蚜虫密度成极显著的负相关。

The result shows that the vesicle diameter first increase and then decrease with the increase of AOT mole fraction, the change regularity of which is the same with the depth of apparent blue color. The vesicle size increases with the increase of total surfactant concentration at any mixing ratio.

新制备的PTA／SDS=3／7，总浓度为0.01M的样品，负染色透射电镜观测发现了管状和球状结构的囊泡，球状囊泡的粒径在50～200nm之间，管状囊泡结构直径在70～200nm之间，而长度大约为7000nm，但是类似的"管子"在新制备溶液中还是比较少。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。