小站备考
考雅思
剑桥雅思听力
剑桥雅思17听力

剑桥雅思17听力test4section4原文答案解析+文本精讲(第31题到第40题)

展开
Maple syrup
全文音频:
Tip:单击查看句义;划选/双击查生词

[01:10.58]Hello everyone. Today we’re going to look at another natural food product and that’s maple syrup.
[01:19.50]What is this exactly?
[01:21.54]Well, maple syrup looks rather like clear honey, but it’s not made by bees; it’s produced from the plant fluid – or sap – inside the maple tree and that makes maple syrup a very natural product.
[01:38.82]Maple syrup is a thick, golden, sweet-tasting liquid thatcan be bought in bottles or jars and poured onto food such as waffles and ice cream or used in the baking of cakes and pastries.
[01:54.24]It contains no preservatives or added ingredients, and it provides a healthy alternative to refined sugar.
[02:03.53]Let’s just talk a bit about the maple tree itself, which is where maple syrup comes from.
[02:10.21]So, there are many species of maple tree, and they’ll grow without fertilizer in areas where there’s plenty of moisture in the soil.
[02:20.62]However, they’ll only do this if another important criterion is fulfilled, which is that they must have full or partial sun exposure during the day and very cool nights – and I’ll talk more about that in a minute.
[02:37.89]There are only certain parts of the world that provide all these conditions: one is Canada, and by that, I mean all parts of Canada, and the other is the north-eastern states of North America.
[02:53.12]In these areas, the climate suits the trees perfectly.
[02:57.95]In fact, Canada produces over two-thirds of the world’s maple syrup, which is why the five-pointed maple leaf is a Canadian symbol and has featured on the flag since 1964.
[03:12.81]So how did maple syrup production begin?
[03:16.72]Well, long before Europeans settled in these parts of the world, the indigenous communities had started producing maple sugar.
[03:26.37]They bored holes in the trunks of maple trees and used containers made of tree bark to collect the liquid sap as it poured out
[03:36.96]As they were unable to keep the liquid for any length of time – they didn’t have storage facilities in those days – they boiled the liquid by placing pieces of rock that had become scorching hot from the sun into the sap.
[03:52.94]They did this until it turned into sugar, and they were then able to use this to sweeten their food and drinks.
[04:01.67]Since that time, improvements have been made to the process, but it has changed very little overall
[04:13.93]So let’s look at the production of maple syrup today.
[04:18.76]Clearly, the maple forests are a valuable resource in many Canadian and North American communities.
[04:26.19]The trees have to be well looked after and they cannot be used to make syrup until the trunks reach a diameter of around 25 centimetres.
[04:36.78]This can take anything up to 40 years.
[04:40.68]As I’ve already mentioned, maple trees need the right conditions to grow and also to produce sap.
[04:48.67]Why is this? Well, what happens is that during a cold night, the tree absorbs water from the soil, and that rises through the tree’s vascular system.
[05:01.11]But then in the warmer daytime, the change in temperature causes the water to be pushed back down to the bottom of the tree.
[05:09.84]This continual movement – up and down – leads to the formation of the sap needed for maple syrup production.
[05:19.87]When the tree is ready, it can be tapped and this involves drilling a small hole into the trunk and inserting a tube into it that ends in a bucket.
[05:31.76]The trees can often take several taps, though the workers take care not to cause any damage to the healthy growth of the tree itself.
[05:42.54]The sap that comes out of the trees consists of 98 percent water and 2 percent sugar and other nutrients.
[05:51.08]It has to be boiled so that much of that water evaporates, and this process has to take place immediately, using what are called evaporators.
[06:02.41]These are basically extremely large pans – the sap is poured into these, a fire is built and the pans are then heated until the sap boils.
[06:15.04]As it does this, the water evaporates, and the syrup begins to form. The evaporation process creates large quantities of steam, and the sap becomes thicker and denser, and, at just the right moment, when the sap is thick enough to be called maple syrup, the worker removes it from the heat.
[06:37.71]After this process, something called ‘sugar sand’ has tobe filtered out as this builds up during the boiling and gives the syrup a cloudy appearance and a slightly gritty taste.
[06:50.52]Once this has been done, the syrup is ready to be packaged so that it can be used for a whole variety of products.
[06:59.07]It takes 40 litres of sap to produce one litre of maple syrup so you can get an idea of how much is needed! So that’s the basic process. In places like Quebec where …

Question 31-40
收藏
反馈
笔记
我的笔记
5000
保存

Complete the notes below.

Write ONE WORD ONLY for each answer.

Maple syrup

What is maple syrup?

• made from the sap of the maple tree                                        • colour described as 31

• added to food or used in cooking                                              • very 32 compared to refined sugar

The maple tree

• has many species                                                                        • needs moist soil but does not need fertiliser as well

• needs sunny days and cool nights

• maple leaf has been on the Canadian flag since 1964               • best growing conditions and 33 are in Canada and North America

Early maple sugar producers

• made holes in the tree trunks                                                      • used tree bark to make containers for collection

• used hot 34 to heat the sap               • sweetened food and drink with sugar

Today’s maple syrup

The trees

• Tree trunks may not have the correct 35 until they have been growing for 40 years.

• The changing temperature and movement of water within the tree produces the sap.

The production

• A tap is drilled into the trunk and a 36 carries the sap into a bucket.

• Large pans of sap called evaporators are heated by means of a 37 .

• A lot of 38 is produced during the evaporation process.

• ‘Sugar sand’ is removed because it makes the syrup look 39 and affects the taste.

• The syrup is ready for use.

• A huge quantity of sap is needed to make a 40 of maple syrup.

名师1对1,深度分析薄弱项,高效提分

去咨询
 后才能查看题目解析,还没有账号? 马上注册

学习页面

Medi

terr

土地

anean