雅思考试听力练习第二十五期

　　I've brought my notes on our Biology Field Trip to Rocky Bay, Colin,

　　so we can work on our report on the research we did together.

　　OK. I've got mine too. Let's look at the aims of the trip first.

　　Right. What did you have?

　　I just put something about getting experience of the different sorts of procedures used on a field trip.

　　But we need something about what causes different organisms to choose particular habitats.

　　I agree. And something about finding out how to protect organisms in danger of dying out?

　　In our aims? But we weren't really looking at that.

　　I suppose not. OK, now there's the list of equipment we all had to bring on the field trip.

　　What did they tell us to bring a ruler for?

　　It was something about measuring the slope of the shore,

　　but of course we didn't need it because we were measuring wind direction, and we'd brought the compass for that...

　　But not the piece of string to hold up in the air!

　　Didn't Mr Blake make a fuss about us leaving that behind.

　　Yeah. He does go on. Anyway it was easy to get one from another of the students.

　　Now, the next section's the procedure. I sent you the draft of that.

　　Yeah. It was clear, but I don't think we need all these details of what time we left

　　and what time we got back and how we divided up different research tasks.

　　OK. I'll look at that again.

　　Then we have to describe our method of investigation in detail.

　　So let's begin with how we measured wave speed I was surprised how straightforward that was.

　　I'd expected us to have some sort of high-tech device not just stand there and count the number of waves per minute.

　　Not very precise, but I suppose it was good enough.

　　But the way we measured the amount of salt was interesting.

　　In the water from the rock pools?

　　Yeah, oh, I wanted to check the chemicals we used in the lab when we analysed those samples

　　was it potassium chromate and silver nitrate?

　　That's right.

　　OK. And we need the map of the seashore. You just left that to me.

　　And I had to do it while the tide was low, well that was OK,

　　but the place I started it from was down on the beach

　　then I realised I should have gone up higher to get better visibility, so I had to start all over again.

　　But at least I'd got the squared paper or I'd have had problems drawing it all to scale.

　　Yeah. It looks good.

　　We could get a map of the region off the internet and see if we need to make any changes.

　　I had a look but I couldn't find anything.

　　But you took some pictures, didn't you?

　　Yeah. I'll email you them if you want.

　　OK. I'll make my amendments using those then I can scan it into our report. Great.