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Applying the software ADAMS for dynamic simulation and Pro/E for three-dimensional design creates the mechanical system of virtual prototyping model of the 200t crawler crane. The models of the drag bar, the spring backstop, the luffer rope and the crawler in the system are established well by ADAMS/View module. The dynamic simulation of the complete mechanical system is researched at series of work condition, which occurs possibly the crawler crane boom backward tipping as the crawler crane unloads suddenly.

本文应用虚拟样机技术动力学仿真软件ADAMS，结合三维实体设计软件Pro/E构建了200t履带起重机的虚拟样机机械系统模型，并利用ADAMS/View模块完善了系统中拉板、弹簧式防后倾装置、变幅钢丝绳和履带模型：研究了履带起重机突然卸载时可能发生臂架后倾的一系列工况下，整机机械系统模型的动力学仿真。

A single pump drainage may produce flow backward when the check valve should be set up.

单台水泵排水有可能产生倒灌时，应设止回阀。

Eagle-headed beast churned its wings backward like a great sail, slowing to a delicate landing.

一群侍从早已恭候，他们拥上前接过缰绳，给狮鹫戴上结实的头套。

And by the backward stochastic differential equation we get the corresponding partial differential equation of the European option price when those parameters are constants.

并且，借助倒向随机微分方程找到在以上参数均为常数时，期权价格所满足的偏微分方程。

I am staying in my cart, staring through the window at the aspens moving slowly backward and figuring out what the distant prairie looks like.

呆呆地坐在车中，望着窗外缓缓退后的一棵棵白杨，不知远处的草原此时是一幅什么景象。

Graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles; springboks; impalas; addax; gerenuks; blackbucks; dik-diks

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131I in boreholes will flow with groundwater and gather in the backward position, then disperse towards the aquifer.

131I在钻孔中随地下水流动，在地下水下游侧富集，并向含水层中弥散。

The realm fell steadily behind, century by century; it became impoverished, backward and prey to the caprices of nature.

一个世纪接一个世纪，这个领域逐步落后；它变得贫困、落后、被反复无常的自然折磨。

Consequently this thesis find out the causes of personality cult by way of looking back the development of personality cult in our nation and the significant damage personality cult brought on. The causes of phenomena of personality cult mainly involve the serious inaccuracy in dealing with the leader-party relations in communist movement, the backward feudalistic remains, faultiness in democratic system, careerists" advocating and leaders" inclination to compliments, and so on.

所以本文通过回顾我国个人崇拜的发展历程及其所造成的严重危害，找出个人崇拜产生的原因，主要是国际共产主义运动中在处理领袖和党的关系问题中出现了严重偏差，封建专制主义的余毒，民主制度的不健全，野心家的推波助澜、领袖爱听颂歌的弱点等方面。

Peggy showed off her new dancing steps and Walter, not to be outdone in a matter of entertaining visitors, his prowess at handstands, cartwheels and backward somersaults.

佩吉卖弄了她的舞步，而沃尔特在讨好观众方面也不甘示弱，就拿出了倒立、横翻筋斗和后翻筋斗的拿手好戏。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。