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第104期：主餐一道：泛聽練習
以下段落是摘自新聞里的一些重要信息,并不是一個段落的聽寫。空內信息可在本新聞中全部找到,大家可以根據這些信息復述新聞。
一、泛聽建議：
1、完整聽一遍，掌握大意。
2、繼續聽，特別注意關鍵信息。遇到相似的詞，寫下來。
3、復述新聞。
Law enforcement officials are reporting progress in the investigation of the Boston Marathon _1_ that killed at least 3 people and _2_ more than 170. Video of the bombing scene has been key and the possible suspect has been spotted. However, NPR's Tom Gjelten says the FBI is saying that no arrests have yet been made in the case.
執法官員報告了波士頓馬拉松賽爆炸案的調查進展，這起爆炸案造成至少3人死亡，170余人受傷。爆炸現場的錄像成為關鍵線索，警方已鎖定了嫌疑人。但是，據NPR新聞的湯姆·吉杰爾登報道，聯邦調查局表示目前并沒有逮捕任何案件相關人員。
A senior law enforcement official tells NPR that video of the spot warns at least one of the bombs _3_, shows a man setting down a bag and then leaving the scene. But the official says that there is not necessary mean that the man is the suspect. We need more than that, the official says.Early press reports say a man _4_ and was even been taken to the federal court house in Boston, but the FBI is knocking no reports down on hard.In the statement, the FBI said "contrast to widespread reporting, no arrests have been made in connection with the Boston Marathon attack."Over the past days there have been a number of press reports based on information from unofficial sources that have been inaccurate, the bureau said. Tom Gjelten, NPR News, Washington.
一名高級執法官員接受NPR新聞的采訪時表示，案發現場的監控錄像表明，至少一枚炸彈爆炸前，一名男子放下一個背包之后離開案發現場。但是官員表示，并不是說這名男子就是嫌疑犯。官員表示，我們需要更多線索。早前有媒體報道，一名男子已被逮捕，并已被送往波士頓聯邦法庭，但是聯邦調查局否認了這一說法。聯邦調查局發表聲明表示，“與大量報道相反，目前并沒有逮捕任何波士頓馬拉松賽襲擊案的相關人員。”聯邦調查局表示，過去這幾天，大量媒體依據非官方信息源進行的報道均不屬實。NPR新聞，湯姆·吉杰爾登華盛頓報道。
The FBI is leading an investigation to poison letters that were sent to political leaders. NPR's Ari Shapiro reports one was addressed to president Obama, and another to Mississippi senator, Roger Wicker.
聯邦調查局正在調查寄給政界領導人的有毒信件。據NPR新聞的阿里·夏皮羅報道，其中一封寄給了奧巴馬總統，另一封則寄給了密西西比州參議員羅杰·威克。
Both of the letters were intercepted before they _5_ their targets. White House spokesman Jay Carney says the FBI is conducting further tests to confirm the initial readings that the letters contained the poison ricin.
這兩封信都在送達之前被截獲。白宮發言人杰伊·卡尼表示，聯邦調查局正在進行進一步的檢測，初步檢測結果表明信件中含有蓖麻毒素。
"I would underscore that the mail is screened , the mail sent here screened and these tests undertaken at remote sites to mitigate the risk both to those recipients and to the general population."
“我要強調這封郵件的篩查工作，寄到這里的郵件的篩查工作，檢測工作都在遠程站點進行，以降低對收件人和普通大眾的風險。”
詞匯解析：
1. screen 文中用作動詞；表示篩選；檢查，篩查；進行安全檢查
eg. They will screen all their candidates.
他們會對所有求職者進行篩選。
eg. The airline had been screening baggage on X-ray machines.
該航空公司已采用X光機對行李進行安全檢查。
2. back down 放棄（主張、要求、承諾等）；打退堂鼓
eg. The United States had no intention of backing down in its bitter row over farm subsidies.
美國無意就激烈爭吵的農產品補貼問題作出讓步。
It's too late to back down now.
現在打退堂鼓已經太晚了。
He had to back down on plans to backdate the tax changes.
他不得不放棄追溯稅收調整的計劃。
3、underscore vt. 強調；劃線于…下(同近義詞emphasize, stress, highlight）
n. 底線，[計] 下劃線（bobbin thread, bottom-line）
eg:I want to underscore the importance of this decision.
我要強調這份決議的重要性。
4. contain 文中用到了contain不常用的用法，vt.控制；遏制；防止…蔓延
eg. More than a hundred firemen are still trying to contain the fire at the plant...
上百名消防隊員仍在試圖控制工廠的火勢。
eg:The city authorities said the curfew had contained the violence.
市政府稱宵禁遏制住了暴力事件。
eg. He couldn't contain himself for joy.
他高興得幾乎不能控制住自己。
