雅思阅读做不对，因为你查了单词也读不懂，一词多义一定是很多小伙伴做阅读时出现的问题，哈尔滨学为贵整理了四个句子。下方出题句中， please不是“请”，control不是“控制”，一词多义，尤其是单词在句子中的含义是要点。下方红色单词什么意思呢？

1.many artists use a key level of detail to please the brain

2.the physiological arousal of control subjects declined quickly

3.one form of pollution does appear to be a phenomenon that is going to extend well into our future.

4.to present a historical account of differing views of language

答案：

1.please vt.取悦，使高兴

2.control n.对照（组）对照（物）

3.well adv. of high degree, by a large amount （well into our future 一直持续到我们很远的未来）

4.account n.描述，记述

下方是一个有52个单词的长句子，用树形图来表示结构的话是什么样呢？

Other substances were then introduced: including fillers, such as woodflour, asbestos or cotton, which increase strength and moisture resistance, catalysts （substances to speed up the reaction between two chemicals without joining to either） and hexa, a compound of ammonia and formaldehyde which supplied the additional formaldehyde necessary to form a thermosetting resin.

红色部分是主干，蓝色是第2层修饰，黄色第2层修饰，绿色第3层，紫色第4层。

单词：

substance：物质

filler：填充物

woodflour：碎木屑

asbesto：石棉

moisture resistance：防潮性

catalyst：催化剂

chemical：化学制品

hexa：六元化合物

ammonia：氨

formaldehyde：甲醛

form：形成，构成

thermosetting resin：热固性树脂

讲解：

句子主干：

Other substances were then introduced: including fillers, catalysts and hexa. （接下来其他物质被添加：包括填充物，催化剂和六元化合物）

fillers, such as woodflour, asbestos or cotton, which increase strength and moisture resistance,

such as 后方3个并列名词对前方fillers举例，which 引导的从句修饰前方的名词集合。

catalysts （substances to speed up the reaction between two chemicals without joining to either）

括号内容解释catalysts

hexa, a compound of ammonia and formaldehyde which supplied the additional formaldehyde necessary to form a thermosetting resin.

a compound of ammonia and formaldehyde（氨和甲醛的一种化合物）对hexa重复性解释，作为同位语；which引导的从句修饰前方 a compound