托福聽力30天備考計劃第三天：Lecture4

　　單句聽寫學(xué)習(xí)方法操作：

　　1. 聽寫全文;單句：要求每個句子在聽三遍以后寫下來

　　2. 聽寫之后對比，找出錯誤原因

　　3. 跟讀全文，背誦場景詞匯

　　4. 熟讀全文2遍

　　5. 加速聽原文3遍

　　6. 常速聽一遍

　　7. 脫稿錄音(不看原文做單句重復(fù))

　　Day 3rd 聽力學(xué)習(xí)TPO3 中最難的一篇Lecture4分析

　　本文難點：復(fù)雜的場景詞匯和生僻的背景知識;

　　聽力內(nèi)容：光譜學(xué)用于鑒定藝術(shù)作品或考古發(fā)現(xiàn);物質(zhì)元素鑒定

　　how astronomers identify the chemical element in a star

　　文章結(jié)構(gòu)如下：

　　1)開篇引出主題對象：spectroscopy(spectrum; spectral;)

　　Now astronomy didn’t reallybloom into the science it is today until the development of spectroscopy. 注意下定義解釋：信號詞basically (用于下定義)解釋spectroscopy：light決定chemical composition

　　Spectros copy is basically the study of spectra and spectral lines of light, and specifically for us, the light fromstars.

　　2)中途暫停，回顧過去：back up a bit

　　Before we get into that though, it’sprobably a good thing to back up a bit.

　　過渡信號(互問互答-考點)

　　3)Anyone want to takea stab at the scientific term for visible light? And I’m sure all of you know this because you all did the reading for today.多次問答最后重點總結(jié)：(標志詞so)

　　Each pattern stands for a distinct chemical element, and so different sets or patterns of spectral lines mean that the starhas a different chemical composition.

　　4)最后重點：了解flame test: to cause anelement to emit light

　　本文詞匯及相關(guān)補充

　　spectroscopy光譜學(xué); Spectra譜，光譜，頻譜;范圍，幅度;

　　Emit; prism n.棱鏡;(結(jié)晶)柱; a beam ofsunlight;

　　Spectrum-continuous band of rainbow colors;

　　Optical radiation; Uranium; Violet; Magnify; Flametest;

　　Spectrograph; Helium; break up(散開);compile

　　Back up a bit

　　Match up(component/composition); bloom蓬勃發(fā)展; be exposed to