同时存在

As we all know,there is one Simson line at any point on the circumference of triangles,but in this paper, LHP theorem shows that the above conclusion is not correct for any quadrilateral pyramid in three-dimensional space and also during proving LHP theorem,fixed value theorem is proved,at the same time,one guess about the point H and point P on circumscribed sphere of tetrahedron has been concluded.

众所周知，三角形的外接圆周上任一点存在一条 simson 线，而 LHP 定理则指出对于正四面体该结论是不能推广到三维空间上的，并且在论证 LHP 定理的过程中得出了定值定理，同时作为一般四面体的外接球球面上的 H 点、P 点的分布，给出了一个猜想。

Millimeter wave circularly polarized microstrip antenna has the advantage of low profile,simple configuration,but commonly it has narrow impedance bandwidth and axial ratio bandwidth.

毫米波圆极化微带天线具有体积小、结构简单等优点，但是同时也存在阻抗带宽和轴比带宽相对较小的缺点。

Many consumers believe that calcium and vitamin D can only choose one product, this is a misunderstanding, due to individual differences in the prevalence of the human body, not all at the same time also the lack of both calcium deficiency of vitamin D, some long-term use of vitamin D it will inhibit the body's own vitamin D formation, or trigger a large number of vitamin D intake and Yun Ji-poisoning, poisoning symptoms of hypercalcemia caused by liver and kidney dysfunction and soft tissue calcification, manifested as loss of appetite, unresponsive, rhythm arrhythmia, difficulty in breathing, nausea and vomiting, polydipsia polyuria, constipation and so on.

许多消费者认为，补钙只能选择与维生素D合一产品，这是一种误解，由于人体个体差异普遍存在，并不是所有的人同时既缺钙又缺维生素D，部分人长期服用维生素D反而会抑制体内自身维生素D的形成，或是引发维生素D大量摄入而积蕴中毒现象，中毒症状为高钙血症引起的肝肾功能损伤和软组织钙化，表现为食欲减退、反应迟钝、心律不齐、呼吸困难、恶心呕吐、烦渴多尿、便秘等。

Based on these data, we suggested that the principal mating system of Brandt′s voles might be promiscuous and/or polygyny.

因此，我们推断布氏田鼠的婚配制度以混交制占主导地位，同时也存在一雄多雌制的情况。

For several years, various research institutions of pomology and agricultural colleges have been giving a great deal of attention to the study of grape varieties with the aim to add new and better varieties either as table grapes or for the wineries.

在葡萄品种研究工作中，各研究单位的观察记载项目、标准和方法，存在着或多或少的差异，同时也有一些疑难问题，需要讨论解决。

With what can only be described as a mind boggling performance of his hit single Whataya Want From Me, appearing as an apparition in dark profile within a green cone of illuminated swirling clouds, Adam delivered the opening verse of the song with clear, strong, yet hauntingly measured notes that swept his audience into a space/time continuum in which only he and they existed, then broke out into full Planet Fierce rock mode complete with glossy Elvis-esque jacket and pompadour, yet facial and body language that was clearly signature Glambert.

这是一场只能以不可思议来形容的表演！他出现在顶灯投射下的漩涡云层之间，譬如黑夜中的幻影，以清澈的有力的叫人难以忘怀的嗓音为他的热门单曲WWFM开场，将观众们送入一个只有他与他们存在的时空。继而爆发，进入了Planet Fierce的摇滚模式，配之以Elvis式的夹克和发型，可同时他的表情与身体语言又是如此典型的Glambert。

The violent measures adopted by Elizabeth and the Stuarts to enforce conformity caused the more timid and moderate of the Puritans to remain in communion with the State Church, though keeping up to the present day an incessant protest against "popish tendencies"; but the more advanced and daring of their leaders began to perceive that there was no place for them in a Church governed by a hierarchy and enslaved to the civil power.

暴力所采取的措施，黄钱其濂和斯图尔特执行整合造成更多的怯懦和温和的清教徒留在共融与国家教会，虽然饲养至目前为止，每天不断抗议" popish倾向"，但同时，越是先进和气魄，他们的领导人，开始感觉到不存在的地方，他们在一所教堂由一个层次，被奴役的，以民间力量。

By the priori estimates and degree theory on the positive cone, we obtain some conditions on the existence and non-existence of positive solution, at the same time, we also discussed the properties of the positive solution.

利用先验估计和正锥上的度理论，给出了正解存在的条件，同时，也讨论正解的一些性质。

Based on the relationship between matrix and symmetric matrix global exponential stability of the discrete-time neural networks model and the result of exponential convergence rate were obtained by using the characteristics of eigenvalues of a positive definite matrix and introducing a proper factor.

针对带有边界约束的凸二次规划问题，利用离散神经网络模型的建模原理，构造了一个神经网络模型。利用矩阵与对称矩阵的关系和正定矩阵特征值的性质，通过引入一个适当的因子，得到了该离散型神经网络模型是全局指数稳定性和指数收敛率的结果。同时分析了该结果的优越性和存在的不足，提出了解决的3种方法，最后给出了实例说明本方法取得结果的实用性

Usually, equal amounts of positive and negative electricity are present and cancel each other's effect, and so we do not notice that any electricity is there at all.

因此，电是一切物质中的一个重要组成部分，在通常的情况下，等量的正负电同时并存，其作用相互抵消，因此我们根本不会注意到电的存在。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失