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Organic chemicals in synthetic fibers, synthetic rubber and other fields have a very wide range of uses.

有机化工合成纤维，合成橡胶等领域都有着十分广泛的用途。

Use this premium wax/resin ribbon for printing on paper and a wide range of synthetics.

使用此溢价蜡/树脂碳带印刷的纸张和广泛的合成材料。

In the process of ultrasonic vibration cutting, the resonant frequency of mechanical syntonic system varies in a wide range because of system's heating up and variable loads.

在超声振动切削中，由于系统的发热及加工负载的变化，机械谐振系统的谐振频率会在较大范围内发生变化。

The main content of this dissertation includes: 1. Research on the theory of ultrasonic power supply, introduce its development process. On the basis of these, fix on the scheme of medical ultrasonic low-power supply. 2. According to the principle of modularized design, divide medical ultrasonic low-power supply into four parts. They are power amplify circuit, power control circuit, frequency automatic tracking circuit and matching circuit. Separately research on their theories and design their circuits and necessary programs, especially, effectively resolve the problem tracking the supersonic vibration system with a narrow syntony frequency bandwidth and a high swing. 3. The matching experiments gain good result, and prove that medical ultrasonic low-power supply is entirely up to the mustard on intellectualization, wide band of working frequency, steady output and high efficiency.

本文工作的主要内容包括： 1、研究了超声功率电源的原理，并回顾了它的发展过程，在此基础之上确定本文医用小功率超声电源的设计方案； 2、按照模块化的设计原则，将医用小功率超声电源的设计分解为功率放大电路、功率控制电路、频率自动跟踪电路和匹配电路等四个部分，分别研究了各部分的原理，在此基础之上进行了具体的电路设计和程序设计，尤其是有效地解决了对谐振频率带宽窄振幅高的超声振动系统的频率跟踪问题； 3、通过与超声振动系统的各项配合实验，取得了很好的实验结果，验证了医用小功率超声电源完全满足智能化、工作频带宽、输出功率稳定、输出效率高的设计要求。

The second type of variable speed system is designed to make the motor have wide speed range and high precision.

第二类系统是针对要求有高精度控制及宽调速范围的应用场合而设计的。

A big part of its tremendously wide powerband can be attributed to its variable valve timing system.

它极大的广泛powerband很大一部分可归功于它的可变气门正时系统。

Focused on systems analysis, system design, system testing and system-wide implementation of the process.

重点介绍了系统分析、系统设计、系统测试和系统实施的全过程。

In the fork, like a mast-headed seaman, there stood a man in a green tabard, spying far and wide.

就在这叉形的树枝上，站着一个穿绿色粗布短外套的男人，象船桅上守望的水手那样，向四周侦察着。

We've got a wide selection of table wine.

我们有大量的料酒供选择。

Full of quietess and the wide streets will always leave the beautiful rememberence to the first city in the tableland.

相对安静和宽阔的城市街道，总会让人对这个高原第一城留下一些美丽的记忆。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48