大破坏

Because the waterproofing question on the concrete bridge deck has not been regarded enough, the concrete bridges were always destroyed prematurely. Especially all kinds of damages occurred on the bridge deck pavement, which have directly influenced safety of steering and the duration of bridge structures and have done a lot of traffic inconvenience and have caused huge economic loses and have not achieved the anticipated economic efficiency.

混凝土桥梁，由于防水问题一直没有得到足够的重视，导致其过早地遭到破坏，尤其沥青混凝土桥面铺装层普遍出现了各种病害，直接影响了行车的安全和桥梁结构的耐久性，给交通带来了很大的不便，造成了巨大的经济损失，没有达到预期投资的经济效益。

First, this thesis studied the deformed shapes, the maximum lateral resisting forces, and the collapsed mechanism of a steel-framed factory under 921 earthquake.

摘要 首先本研究探讨某钢结构厂房受到921地震后，其结构体的位移情形，及最大的侧向抵抗能力，与形成的破坏机制。

First, this thesis studied the deformed shapes, the maximum lateral resisting forces, and the collapsed mechanism of a steel-framed factory under 921 earthquake.

首先本研究探讨某钢结构厂房受到921地震后，其结构体的位移情形，及最大的侧向抵抗能力，与形成的破坏机制。

A considerable amount of high energy consumption and rare copper and silicon steel, theft and destruction of serious, large-scale use at the same time, will lead to greater environmental pollution and energy waste.

耗用大量高能耗且稀有铜材和矽钢，被盗和破坏严重，同时大量使用，将导致更大的环境污染和能源浪费。

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

Features: high efficiency, small amplitude and high frequency of screening; it differs from the conventional screens with breaking of the surface tension of pulp and small granularity high speed vibration on sieve cover and accelerates the separating of large-density useful mines and increase the contacting probability of the materials smaller than output granularity and the sieve pore.

高频筛效率高、振幅小、筛分频率高。与普通筛分设备的原理不同，由于高频筛采用了高频率，一方面破坏了矿浆表面的张力和细粒物料在筛面上的高速振荡，加速了大密度有用矿物和析离作用，增加了小于分离粒度物料与筛孔接触的概率。

It is shown that the contact interaction enables bottom drillstring to whirl backward, and then an alternate bending stress with higher frequency is produced. So the drillstring fatigue failure could be accelerated. At the same time, a quite strong wallop force of high frequency is produced on the contacting point, and the contacting zone is next to the screw coupling of drill collars. It will easily result in the failure of screw couplings. The research results provide theoretical basis for the prevention of drillstring failure.

研究表明，下部钻柱与井壁的碰摩作用使下部钻柱反向涡动，产生高频的交变弯曲应力，会加速下部钻柱疲劳破坏；下部钻柱与井壁接触点处存在较大的高频冲击力，并且接触区域靠近钻铤螺纹联结处，更容易诱发螺纹联结处失效，该研究成果可为预防钻柱失效提供理论依据。

Do safety precautions in every link.

安全连接着你我，它就在我们的身边，更要放在我们的心中，从&要我安全&转变为&我要安全&，实现中国石化&追求最大限度地不发生事故、不损害人身健康、不破坏环境，创国际一流的HSE业绩&的HSE目标，我们的生活才能更加美好，企业才能更加繁荣。

But Rondǒnia has easily suffered more destruction than any of the other eight states or territories that comprise the 5 million square kilometers of Brazil's Amazon region.

但是比起任何一个组成巴西亚马逊地区那500万平方公里的其他8个州或地区来，荣多尼亚遭受的破坏无疑要大得多。

The Crossfire was designed primarily to fly long distances to reach its target, inflict maximum damage, and return home in one piece.

织火级星际战斗机的设计目的是远程奔袭目标，制造最大的破坏，然后高速返回基地。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。