A number of countries are already in the process of formulating their own standards for the control and reduction of classroom noise.

一些国家已经在着手制定本国关于控制和减少教室噪音的标准。

youdao

The consequences of an excessive number of livestock grazing in an area are the reduction of the vegetation cover and the trampling and pulverization of the soil.

在一个地区过度放牧的后果是植被覆盖的减少和对土壤的践踏和粉碎。

youdao

Kevin Balke, a research engineer at the Texas A&M University Transportation Institute, says that while smart lights can be particularly beneficial for some cities, others are so jammed that only a sharp reduction in the number of cars on the road will make a meaningful difference.

德克萨斯农工大学交通研究所的研究工程师凯文·鲍克说，虽然智能交通灯对一些城市特别有帮助，但有些城市太拥挤了，只有大幅减少道路上的汽车数量才能有效改变拥堵的局面。

youdao

As a result,there is a reduction in the number of nodes,or joints, that produce groups of flowers along stems.

VOA: special.2009.11.10

"Now the question arises whether we can quantify it into a precise emission reduction targets number.

VOA: standard.2009.11.27

Since the implementation of HIPS for the 3 and 4 bedroom properties there have been a sharp reduction in the number of those properties being put on the market even after taking into account a general reduction in the number of properties being marketed due to other factors.

BBC: Hips have split opinion over whether or not they are needed

You are at serious risk of getting HIV in the near future and need to take steps to prevent that happening - such as consistent condom use and reduction in number of sexual partners.

BBC: Highest-ever HIV diagnoses in gay men

The Board believes that this considerable price appreciation, and the associated reduction in number of shares of stock covered by equity awards we issue to newly hired and existing employees, has reduced the perceived attractiveness of our employee equity awards.

FORBES: Salesforce.com Making Plans For 4-For-1 Stock Split