烦请高手们帮小弟翻译一下（中译英）！！！谢谢.

英语高手们，哪位帮小弟翻译一下啊~

在室内通风科学中 {(桑德伯格（Sandberg）著, 1981年；埃瑟雷奇（Etheridge）与（(桑德伯格)（Sandberg）合著,1996年）} ，局部空气平均年龄最初的定义指的是对周围边界封闭空间的局部空气的定义，意思是某个气块离开这个系统（即这个周围边界封闭空间）后则永远不会再返回过来。由于外部“新鲜空气”（即凉爽的或干净的空气）是通过供给的扩散器或进口孔而进入到这个空间的，所以，空间某一点局部空气的平均年龄描述的就是外部“新鲜空气”进入到该点所需要的平均时间。由于陈旧空气经过某个空间时被加热或被污染，所以，这个空间的陈旧空气的概率（浓度）很大 。看图1（ Fig. 1），假如农村地区空气的“ðspÞ”年龄定义为零，那么。用这种概念就能够研究出农村的风是如何使城市的林冠覆盖（层）通风的。空气年龄的分布可以描述：在城市地区内（人们是）如何提供和分配农村的空气（的）。为了建立（按）时间平均（计算的）污染物浓度 (c, kgm3) 和局部空气的平均年龄(sp, s) 的关系，埃瑟雷奇（Etheridge）与（(桑德伯格)（Sandberg） （于1996年）用数学方法推出了“均匀散发法”。为了有助于理解这个方法，我们首先引进稳定的控制方程：

三、从教学活动的主导者转换成教学活动中的引导者、参与者
Third, from teaching activities in teaching activities supevisors convert guiders, participants

“教”，在《说文解字》中的解释是“上所施，下所效也”，其中所隐含有“教师在上，学生在下的上下辈关系”，意味着教师发号施令，学生服从与执行。
"Teaching", in "said wen jie zi" explanation is that "the had done under the validity, the hidden" is a "teacher, students in the XiaBei relationship" on the next, means that teachers, students obey orders with execution.

新课程认为，教学过程是师生互动过程，教师由知识主导者转向学生学习的参与者和指导者;
The new curriculum, the teaching process is that teacher-student interaction process, teachers leader by knowledge to students' learning participants and directors;

教师的理念应由“教”转为“导”，让传统意义上的教师的教与学生的学不断让位于师生互教互学，形成一个真正的“学习共同体”。
Teachers' ideas should by "teaching" to "guide", let the traditional sense of teachers' teaching and students' learning lessons, keep teachers and students formed in a true "learning community".

在这个“共同体”中，教师要指导学生懂得如何获取自己需要的知识，掌握获取知识的工具以及学会如何根据认识的需要去处理各种信息的方法，使学生“会学”“能学”;
In this "community", the teacher should guide students to know how to get to the knowledge, acquiring knowledge tools, and learn how to according to the needs of understanding to deal with all kinds of information method to make students "will study" "can learn";

教师不仅要参与到学生的学习活动中，而且要成为学生学习的促进者，一切以学生的发展为本，采取有效的方式和手段，激活每个学生身上的潜能;
Teachers should not only involved in their children's learning activities, but also as the promoter, students learn to students' development for all this, take effective ways and means, activate every student body's potential;

放手让学生在有限的时间里，多看、多动、多思、多听、多说;
Lets students in the limited time, see, hyperactivity, think more, listen, speak;

以各种形式开展交流活动，诸如小组活动、同伴活动、 角色扮演、游戏等课堂活动方式，让学生在课堂上大有可为，各显其能。
In various forms, such as the exchanges activities group activities and peer activities, role playing, games etc classroom activities way, let the students in class, GeXianJiNeng bright prospects.

使学生从“要我学”变为“我要学”，真正成为学习的主人,惟有这样，教师才能真正成为学生的朋友、伙伴，成为学生学习的引导者与参与者。
Make students from "want me to learn" into "I want to learn," truly become the study master, but such students, teachers can become the friend, partner, become a guide to students' learning and participants.

From the above calculation and analysis that the same information, Pap index Rumsfeld and the results of the index are different. Why is there such a phenomenon? Price index is to be discussed as an example. From factors include, Pap price index report with the same period of metrics as sales, as compared to the standard base period, from sales to change, the Pap reflected in the retail price index changes in commodity prices, it also contains Variations in sales volume, which means that Pap index has not absolutely ruled out with the measurement factors. Using that formula: As a result, the formula contains some impact. From the absolute point of view

Sino-called price and the sales were affected by the amount.
Is not a total change due to factors completely denied the existence of Pap index and the choice of Rumsfeld's index of all this? It should also be applied from the index of real economic significance to analyze. The purpose of calculating the price index is measured by the volatility of commodity prices, to illustrate the changes in market prices of the extent of the impact of people's lives. If Rumsfeld's index formula that measure the same factors in the fixed base period, and its molecular denominator of the difference between that price as a result of changes in the past by residents of the purchase amount and structure of the purchase of goods, the amount of how much spending is clearly no practical significance The. From a practical point of view, people are more concerned with sales in the reporting period conditions, as a result of price changes on real life. If Pap index formula that measure the same factors in the fixed period, and at the same time reflects the price changes in the structure of consumption, compared with a clear economic significance, the molecular formula and the denominator of the difference, that as a result of changes in prices, according to people present The purchase amount and structure of the purchase of goods, the number of the amount of expenditures. Can be seen with Pap index formula price index, compared with the price index for the purpose of the calculation. Sales of the index calculation is to reflect the change in sales, the price fixed in the base year level means that the original price level on the basis of a comprehensive change in the determination of sales is more appropriate. As a result, sales in the preparation of the index, the general should be based commodity prices as a measure of the same factors. This choice is also the index system.
To sum up, in calculating the index quality indicators, reporting period should be used as an indicator of the number of the same factors that measure. In calculating the number of indicators index, the base period should be used as indicators of the quality of the same factors that measure. This is the preparation of the composite index of general principles.
3. Measure with the fixed factors in a given period of Composite Index
Measure the same factors will be fixed at a particular time level, the formula is:
Young Price Index (8.6)
Yang Ge Wu volume index (8.7)
This is a British scholar Young (Young) was first adopted in 1818, it is also known as the Young formula. The index of the same factors that measure the level of the base period is not, nor is the level of the reporting period, but the level of a typical period or the average level, and here the index during the same period of metrics factors are different. With the choice of a fixed measure, not only to simplify the calculation of the index, and avoid some of the abnormal situation created by the non-comparability, in order to facilitate the observation of the phenomenon of long-term change in trend. As a result, Young formula often used in practice. Of course, the same factors that measure the interval after a certain period of time, as the situation changes should be revised and adjusted in a timely manner.

你可真猛 一分不给还这么长，还不让用工具，汗~！

汗ing111

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