托福阅读长难句历来是阅读的难点，想要攻克长难句必须注意在平时进行积累。这次为大家整理了托福阅读长难句详解120句，对每个句子的结构都进行了详细解析，本文带来的是86-90，大家可以在备考中进行学习。
86.In 15 or 30 seconds.a speaker cannot establish the historical context that shaped the issue in question，cannot detail the probable causes of the problem，and cannot examine alternative proposals to argue that one is preferable to others.
(以and连接的并列句)在15或30秒的时间里，发言人无法建立形成正在讨论的问题的历史背景;不能 详细阐述问题产生的可能原因;无法仔细审查几种建议以辩论哪一种更可取。
解析：
主句1：a speaker cannot establish the historical context
主句2：cannot detail the probable causes of the problem
主句3：and cannot examine alternative proposals
从句1：that shaped the issue in question
从句2：to argue that one is preferable to others.
主句1，2，3并列关系
从句1修饰主句1中的context
从句2修饰主句3的proposal
87.Recognizing the power of television's pictures，politicians craft televisual, staged events，called pseudo—events，designed to attract media coverage.
(三个过去分词结构staged，called pseudo—events，designed to…都作定语，其中staged修饰events，called pseudo.events与designed to attract media coverage都修饰前面的staged events;craft——制作)
政治家们认识到电视画面的威力，因此精心制作旨在吸引媒体报道的经过故意安排的电视事件(被称为虚构事件)。
解析：
主句：politicians craft televisual
从句1：Recognizing the power of television's pictures
从句2：called pseudo—events
从句3：designed to attract media coverage.
修饰结构1：staged events
从句1修饰主句中的politicians
从句2修饰主句中的 televisual
修饰结构1是televisual的同位语
从句3修饰主句中的televisual
88.Now，scientists have data from satellites and ground—based observations from which we know that the auroral brilliance is an immense electrical discharge similar to that occurring in a neon sign.
(介词提前的定语从句：from which，which指前面的data)
如今，科学家们根据来自卫星和陆基观察的数据得知，极光是发光原理类似于霓虹灯的巨大的电流释放。
解析：
主句：scientists have data from satellites and ground—based observations
从句1：from which we know
从句2：the auroral brilliance is an immense electrical discharge
从句3：similar to that occurring in a neon sign
从句1修饰主句中的data
从句2作为从句1的宾语从句，表示科学家从data中的得知的内容
从句3修饰从句2整句
89.Outside the magnetosphere，blasting toward the Earth is the solar wind，a swiftly moving plasma of ionized gases with its own magnetic field.
(倒装句：blasting toward the Earth is the solar wind…=the solar wind…is blasting toward the Earth)
在磁气圈的外围，太阳风暴——一个有着自身磁场、迅速移动的电离化气团构成的等离子体一极快地袭向地球。
解析：
主句： blasting toward the Earth is the solar wind
倒装结构，正常顺序为the solar wind…is blasting toward the Earth
修饰结构1：Outside the magnetosphere
修饰结构2：with its own magnetic field
从句：a swiftly moving plasma of ionized gases
修饰结构1修饰整个主句
修饰结构2修饰从句中的ionized gases
从句是主句中solar wind的同位语从句
90.Matching the influx of foreign immigrants into larger cities of the United States during the late nineteenth century was a domestic migration，from town and farm to city，within the United States.
(倒装句：Matching the influx…was a domestic migration…=a domestic migration…was matching the influx…)
19世纪晚期，与外国移民流入美国较大城市相媲美的，是美国本土移民从小镇和乡村到城市的国内迁移。
解析：
倒装，主干正常顺序是a domestic migration was Matching the influx of foreign immigrants….
从句1：from town and farm to city，
从句2：within the United States
从句1，2共同修饰主干中的a domestic migration
以上是本期为大家带来的托福阅读长难句详解120句(18)，阅读除了句型之外还要注意词汇，希望大家在不断的坚持中提升自己的阅读能力，最后前程百利祝大家都能取得理想的托福考试成绩。
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