【正文】 ll be back through the article again. Just to be sure. Can you remember what was called? M: Sample surveys and social science research, I think, by Mehta. W: MEHTA? M: Yep. And he also remended a more reasonable called Survey research by Belle, I think. It39。m pretty sure remended questionnaires are source of highly reliable data as long as you design the questionnaire properly in the first place the data will be fine. W: No. I39。s right. It39。re two, err, no, three parts to it. The first we have got to write an essay about ways of collecting data, then... W: What39。t you think? That39。s right. And you can get a double that amount if you can39。s too difficult, then your selfesteem can suffer, but it39。re not getting proper feedback on how you will be getting on your subjects. Besides help with academic problems, you may also need personal counselling. If you think you39。ll be more than enough today. And tomorrow let39。s a charge for all of them except the Botanical Gardens. Oh and the markets. Of course you don39。s open every day it might be difficult to get in tomorrow because the chair services. W: That is true. But the Art Gallery isn39。d like to go to the markets near the river too. But ... Oh no way, that39。s the Cathedral Museum. (Oh!) The Cathedral itself is open morning and afternoon. The Castle is just open from 1 to 5 so we can39。s just have a snack and drink. W: It sounds good to me. M: Well. Let39。s the 14 waitress. Let39。s spending four weeks travelling along Europe. W: Just like us? M: Yes, just like us. He told me the names of some places where we should eat. Great food and not too expensive, he said. Oh, and he also gave me this map of the buses to me, he said he didn39。t do any transactions. They said the problem would be fixed in a few minutes so I waited. And then I started talking to another guy in the bank and I fot the time. W: Oh, really? Someone you met in the bank. Does he work there? M: No, he was a tourist, from NY. His name is Henry. And he39。t matter. I had a coffee and I had been reading this guidebook for tourists. Sit down. 13 M: Umm. W: You look very hot and tired. What would you like to drink? M: I39。s not a great deal you can do if you have what we call a street canyon, a whole set of highrises enclosed in the narrow street. Trees need water to grow. They also need some sunlight to grow and you need room to put them. If you have the chance of knocking buildings down and replacing them, then suddenly you can start looking at different ways to design the streets and to introduce...(End) test2_section1 W: Oh, Peter, there you39。ll ask? Well, the main difference between a tree and a building is a tree has got an internal mechanism to keep the temperature regulated. It evaporates water through its leaves. And that means the temperature of the leaves is never very far from our own body temperature. The temperature of a building surface on a hot sunny day can easily be 20 degrees more than our temperature. Trees, on the other hand, remain cooler than buildings because they sweat. This means they can humidify the air and cool it, a property which can be exploited to improve the local climate. Trees can also help break the force of the winds. The reason that high buildings may keep windier at ground level is that as the wind goes higher and higher, it goes faster and faster. When the wind hits the building, it has to go somewhere. Some of it goes over the top and some goes around the sides of the building, forcing those high level winds down to ground level. That doesn39。re two major areas that I39。s rivers supported more than 160 water mills and many of these continued to operate well into the nieenth century. But then the steam engine was invented and then the railways came and the centres of industry were able to move away from the rivers and the countryside and into the towns. So industrial villages like this one became very rare. So that39。m just going to give you a brief account of the history of the museum before letting you roam about on your own. I won39。t keep you long. OK? Now from where we39。s the history for you. If you39。ll focus on in my talk: how vegetation can have a significant effect on urban climate and how we can better plan our cities using trees to provide a more fortable environment for us to living. Trees can have a significant impact on our cities. They can make our cities, as a whole, a bit less windy or a bit more windy as that what you want. They can make it a bit cooler if it39。t happen when you have trees. Trees filter the wind and considerably reduce it preventing those very large strong gusts that you so often find around tall buildings. Another problem i