声学

This article explains the basic principles of acoustic treatment.

本文介绍的基本原则声学治疗。

In this paper, application of statistical energy analysis method in acoustic design of road tunnel was studied.

因此，利用统计能量分析方法，开展其在公路隧道声学设计中的应用研究。

Speech and Language Development in Children; Acoustic Analysis of Children's Speech .

儿童语言和表达能力的发展。儿童语音在声学上的分析。

It is tied to grammar design and to the acoustic environment of the user.

它与语法的设计和声学环境的用户。

It is possible through music to create all the acoustic features that we use in our everyday language.

音乐是可以通过声学特性创造的一切，我们用我们的日常用语。

We can solve the acoustic problem for users.

我们可以为用户解决各种声学难题。

It has been designed for acoustical technicians, sound engineers, scientists and students.

它被设计的声学技术，健全的工程师，科学家和学生。

With the development of education, the classroom acoustical environment has become one of the important objects in the research of acoustics.

本文的目的和意义在于针对我国经济发展水平的现状，对教室的声学环境进行研究。

I wanted to write this article to educate people about soundproof acoustical doors.

我想要写这篇文章，以教育人民认识隔音声学门。

It then combines this information to provide an accurate representation of the room's acoustical problems.

然后，结合此信息来提供准确的代表房间的声学问题。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。