次声

The frequencies used in sonar systems vary from infrasonic to ultrasonic.

声纳所使用的频率从次声到超声不等。

Dust removers have been installed for boilers in many thermal power plants.The sound pressure levels of low frequency noise and infrasonic sound at workplaces were measured.

由于许多火力发电厂锅炉安装了吹尘器，为了解它运行中的低频噪声和次声在工人工作场所的水平，我们对现场进行了测试。

This paper analyzed the advantage and disadvantage of three sound wave focus methods, that is lens focus, curved autofocus, and phased-array focus on the base of draw lessons from supersonic focus technic, consequently preferred and designed the infrasonic phased-array focus system.

文中在借鉴超声波聚焦技术的基础上，分析了透镜聚焦、曲面自聚焦、相控阵聚焦等三种声波聚焦方法的利与弊，从而选用和设计了次声相控阵聚焦系统。

Infrasonic acoustic radiation weapons

次声辐射武器

This so-called "infrasound" can be detected at distances in the order of thousands of kilometers.

这种所谓的&次声&在几千公里远的地方就可以被探测到。

AIM: To measure the frequency and sound pressure of the infrasound in cars and trains.

目的： 测量汽车和火车内环境次声的频率和声压级的分布。

Its main use is in fact the sole purpose is to create a special atmosphere infrasound.

它的主要用途事实上也是唯一用途，就是制造特殊的次声氛围。

Infrasound exists widely in nature, industrial production, traffic and transportation, and military environment.

次声广泛存在于自然界、工业生产环境、交通运输环境和军事环境中。

In Russia, Japan, England and Australia, measurement of environment infrasound was ever performed.

前苏联、日本、英国和澳大利亚等国曾对部分环境次声进行了测量。

Objective To explore the expression of heat shock protein 70 HSP70 in the brain of rat exposed to infrasound.

目的 探讨次声作用后大鼠脑的热休克蛋白70(heat shock protein70，HSP70)的表达。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。