6. 解释类
雅思听力中最常见的解释类信号词包括mean, in other words, that is to say等。
EXAMPLE 1
剑7 TEST 2 SECTION 4
38. Gives a larger relevant field of .............
录音原文如下：This means that there is a bigger area of vision on the side where most of the action occurs.
39. Cross-lateral players make ...... too late.
录音原文如下：It means that they can only make corrections much late.
接下来我们通过两篇经典真题来帮助考生们进一步了解Section 4常见考点及听中注意事项。
EXAMPLE 1
V120811S4=V07147S4
场景：New map helps to protect the Tumucuaque in the northeast Amazon
31-35填空题
31. Map covers the areas of 39000 hectares(注意数字的读法)
注意：数字考点为雅思听力的基本考点，除了频繁出现在Section 1以外，经常会在其它Section中考察一题。往往涉及到千位以上的数字，建议考生在复习中总结数字常见读法及常见数字陷阱。
32. This rain-forest is the world’s biggest national park(联想biggest可能的同义词largest)
33. Cooperation from government, scientist and help from local Indian tribes(部落，不少同学不熟悉这个词)
34. They applied the GPRS data, local knowledge and aerial photographs.(专有名词和空前词定位，答案写photos可能算对)
35. Some places are unmarked, besides forest, the plants used for medicine
36-40单选题
36. This map outcome will be the first and most important step in: C. Protect the local and world forest land
37. Another(增补类信号词) result can be: A. Develop community
38. Map can be used to educate them: B. Local history
39. The problem when making the map: A. Language barriers
40. Finally the most important(强调类信号词考点) success is: C. We won local people’s contribution
注意：单选题部分如果灵活根据信号词定位就能帮助考生大大减轻听力负担，更快锁定答案。
EXAMPLE2
V120204S1
话题：塑料的制作
31-40填空题
31.use cotton and acid
注意：该题考察学生的词性预测能力，根据and两端词性一致的原则进行听前的词性预测，可以帮助考生在听力过程中做到更加精确的定位。
32.Plastic is commonly found on: product such as detergent bottles, milk jugs
(daily product bottles)
33.First is used to produce artificial silk
34.Cellulose is not like real plastic because it becomes hard when heated.
背景知识补充：赛璐璐，即硝化纤维塑料，是塑料的一种，由胶棉(低氮含量的硝化纤维)和增塑剂(主要是樟脑)、润滑剂、染料等加工制成。透明，可以染成各种颜色，容易燃烧。用来制造玩具、文具等。旧称假象牙。
35.First plastic made in laboratory
36.
注意：该题考察学生对于“实验室”单词的拼写，首先需要知道该单词有两个发音，而录音中往往出现的是全拼的发音，可是在实际考试中如果发现全拼有困难，不妨采取简拼形式，将laboratory 拼成lab,而不用在拼写上过于纠结，错失节奏。
36.A chemist named Alexander Parkes developed the first plastic
37.Recycled pens
38.Disadvantages: it will produce gases when burned
注意：该题考察名词单复数问题，在填空题所听即所得的前提下关注需要填写复述形式的单词，并注意特殊单词的复述形式。
39.It decomposed by light (sunlight)
40.Natural rubber wood no longer had a stranglehold on rubber supplies
关于塑料的背景知识：
优点1.大部分塑料的抗腐蚀能力强，不与酸、碱反应。2.塑料制造成本低。3.耐用、防水、质轻。4.容易被塑制成不同形状。5.是良好的绝缘体。6.塑料可以用于制备燃料油和燃料气，这样可以降低原油消耗。
缺点1.回收利用废弃塑料时，分类十分困难，而且经济上不合算。2.塑料容易燃烧，燃烧时产生有毒气体。3.塑料是由石油炼制的产品制成的，石油资源是有限的。4.塑料埋在地底下几百年、几千年甚至几万年也不会腐烂。5.塑料的耐热性能等较差，易于老化。
