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Such as: fatigue, excessive eating or speaking, a clear heart, palpitation, shortness of breath, cough, sleep in the middle of the night due to breathing difficulties and hold up; induced severe pulmonary emphysema, cyanotic lips; arrhythmia, there are boun apical MA Law, that these symptoms of hypertensive heart disease have reached the end of irreversible late risk of death at any time.

劳累、进食或过多说话后，有明显心悸、心慌、气短、咳嗽症状，半夜睡眠中因呼吸困难而憋醒；严重时会诱发肺气肿、口唇紫绀；心律失常，心尖部有奔马律，出现这些症状说明高血压性心脏病已到达不可逆之终晚期，随时有死亡危险。

This would bring difficulties to parameterization of the plateau boundary layer.

这将给高原边界层的参数化带来复杂性。

This research method is independent of Green"s function and variational structure. So it can tackle with the BVP for non self-adjoint and self-adjoint difference equations and overcome the difficulties brought about by the establishment of Green"s function, a study of the sign and the estimate of below and above bounded for Greens function.

本章的研究方法既不依赖于Green函数又不依赖于变分结构，因而能解决非自共轭的差分方程边值问题，且克服了Green函数的建立、其符号的判断及其上下界的估计给研究带来的困难，该方法同样适用于研究自共轭的差分方程边值问题。

The development of them is restricted by the unsuitable climate and soil, which shows in the difficulties in bourgeon and low germination rate of seeds.

而且由于气候和土壤的不适，种子萌发困难，发芽率低，严重威胁了这一树种的生存和发展。

Mr Boutros-Ghali said the same difficulties applied to governance reforms, such as whether the US would give up its veto, or whether board decisions would require a double majority of countries as well as shareholders.

布特罗斯-加利表示，治理改革也面临同样的困难，例如美国是否会放弃其否决权、理事会决议是否需要多数国家和股东同意才能生效。

He is not one to bow before difficulties.

他不是一个向困难低头的人。

He is not one of those who bow before difficulties.

他不是那种在困难面前低头的人。

He is not a man to bow before difficulties.

他不是一个向困难低头的人。

We describe the algebraic characteristic of the public-key cryptosystems based on algebraic structures such as elliptic curves,bilinear pairings,as well as braid group s,with the emphasis on the difficulties of constructing public-key cryptosystems based on non-commutative algebraic structures.

通过分析基于椭圆曲线、双线性对以及基于辫子群的公钥密码体制的代数学特征，着重讨论了构建基于非交换代数的公钥密码体制所面临的困难。

Due to complexities of the meso-structure of the braided composites, there are many difficulties in the experiment technology.

本文最后讨论了编织复合材料力学性能的实验研究方法，并对理论分析结果进行了验证。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。