前言

It's true that he's not the head of government—the Supreme Leader and his council of ayatollahs are the chief policymakers—but he's the public face of the country …he's the public voice of the chief state sponsor of terrorism, a country supplying our enemies in Iraq with weapons used to kill Americans and supplying our enemies throughout the Middle East with weapons used to kill Jews.

发言的其它部分则无足观，是前言不搭后语的宗教阐释和政治漫谈的生硬组合。』Josh Marshall对此次演讲的总结是：很难分出胜负，但是昨天的演讲并未提升艾哈迈迪内贾德的形象反而有种贬低效果，美国民众比想像中强大，对于这个问题没有如大部分人预料的一样避而不谈。

PrefacePulmonary embolism is a syndrome caused by emboluses which obstructing the pulmonary arterial system.

前言 肺栓塞(pulmonary embolism，PE)是以各种栓子阻塞肺动脉系统为其发病原因的一组疾病或临床综合征的总称。

One crucial component for high speed machining applications is the development of machine tool feed drives and fast precision motion controls.

前言直线电机直接驱动系统是近 1 0年发展起来的一种新型进给传动方式，在各类高速、精密加工设备上具有广泛的应用前景。

A physical model for numerical simulation and calculation of cross horizontal-tube falling film evaporator used in air-conditioning and refrigeration system was presented.

0前言早在1848年，水平管降膜式蒸发器技术就已经诞生，但是直到20世纪90年代，随着氟氯烃即CFC的逐步淘汰，才开始在制冷系统上被采用。

We fed indoor aquatic animals with fodders containing different protein levels and qualities and mensurated their effects on the excretions of nitrogen and phosphor in grass carps.

1前言 现代渔业生产中，饲料投喂对养殖水域的水质有重要影响，鱼类氮、磷排泄是引起养殖水域水质变坏的主要因素，而氮、磷又是鱼类生长的必需营养元素。

Forewords: to introduce relevant study background, study basis and paper framework.

第一部分为前言，主要介绍相关研究背景、工作基础和论文研究框架。

In addition, he had written many monographs, literary criticisms, screenplays and many introductions, forewords to books of fiction and non-fiction.

同时他也写出了很多专题著作、文学评论、电影剧本以及若干小说和非小说作品的介绍和前言。

Reliability analysis of a steel radial gate main frame on the basis of water head statistics analysis is given.

一、前言 n前，以概率理论为基础的极限状态设计法已相对成熟，在许多领域得到了广泛应川。

On the basis of the new theory of vehicle-track coupling dynamics and by means of the dynamic simulation software TTISIM, the dynamic performances of freight electric locomotive of 120?

前言为了满足我国铁路既有干线货运进一步提速发展的需要，加快交直交电力机车的发展，北车集团大同机车厂正在研制新一代 12 0km/h交流传动B0 -B0 -B0轴式货运电力机车。

Preface; Ships and machinery; Diesel engines; Steam turbines and gearing; Boilers; Feed systems; Pumps and pumping systems; Auxiliaries; Fuel oils, lubricating oils and their treatment; Refrigeration, air-conditioning and ventilation; Deck machinery and hull equipment; Shafting and propellers; Steering gear; Fire-fighting and safety; Electrical equipment; Instrumentation and control; Engineering materials; Watchkeeping and equipment operation; Appendix (SI units, engineering terms, power measurement, fuel estimation, engineering drawings); Index

内容： 前言；船舶及机器；柴油引擎；蒸汽涡轮机和教学；锅炉；饲料体系；泵和泵系统；助手；燃油、润滑油和治疗；制冷、空调及通风；船体和甲板机械设备； shafting和螺旋桨；转向器；消防和安全；电气设备；仪表和控制；工程材料；值班和设备运行；附录(SI单位、工程计算、动力计算、燃料测算，工程图纸)；指数其他信息：水仗，388页，出版日期：1996

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。