听力文本

This is News Plus Special English. I'm Marc Cavigli in Beijing.
Time travelers, if they really exist, seem to be keeping their adventures to themselves.
Researchers with perhaps a bit too much time on their hands conducted an extensive Internet and social media search for evidence of time travelers going back in history and then bragging about it online.
And they came up empty. No real life Dr. Who or Marty Mc Fly from "Back to the Future" tweeting secrets a bit early.
An astrophysicist and his students at Michigan Technological University in Houghton, the United States, searched for mentions of Pope Francis and Comet ISON before they popped into reality. Francis was elected pope last March and ISON was first detected in September 2012.

The idea: If someone mentions a Pope Francis in a 2011 tweet, Facebook post or blog item, then they must have come back from the future with special knowledge.
But no one posted anything prescient.
This and other disappointing results are presented at the American Astronomical Society conference in Washington.
Astrophysicist Robert Nemiroff says if someone went back in time and said something to hint about the future, it would prove the concept of time travel.
Nemiroff says he didn't believe much in traveling backward in time before, and believes less in it now. He jokes unless he himself goes back in time and publishes lots of papers.

中文翻译

这里是News Plus慢速英语，马克·卡维格里从北京为您播报新闻k#_eO1),x%me。
如果时间旅行者真的存在，那他们可能希望将这种冒险经历保密RVQZSM0gO=c[。
不过研究人员可能是时间太多了，于是他们对网络和社交媒体进行了大规模的搜索，试图找出时间旅行者回到过去并在网络上炫耀的证据+t4.SbC,as|h。
不过他们什么都没有找到p4cpO0P*,D~。现实生活中并没有“神秘博士”或是《回到未来》中的马蒂·麦克弗莱这样的人会发推文提前说出秘密事件*plOW5ll9uSR67D;a。
美国休斯敦密歇根理工大学的一名天体物理学家和他的学生选择了教皇弗朗西斯和彗星ISON两大事件，在网上检索事件发生前是否曾有提到事件的言论出现]!HoUN^fS4G。弗朗西斯于去年三月登基，而彗星ISON最早于2012年9月被发现~j&-G1EHDtjPmUnN;I。
如果2011年时有人在推特或脸谱网上提到教皇弗朗西斯，那就说明这个人一定来自未来并带来了特别的知识%A3C,k()C[a(1[。
但是并没有人发表过这种预言M!H;eB#[;yi*%gi]mX。
他们在华盛顿举行的美国天文学会会议上报告了这些令人失望的结果zXIXX8d;xAbv(_U=Yl。
天体物理学家罗伯特·奈米洛夫表示，如果有人曾回到过去并透露了有关未来的事情，那就能证明时间旅行这个概念8y@IyNAW.=j&l-R9。
奈米洛夫表示，他以前并不相信回到过去的时间旅行，而且他现在也不太相信ZbP8JC*J%[。他开玩笑说除非他自己能回到过去并发表论文|,3BnBD_q*@O7J.j+。

译文属可可英语原创，未经允许，不得转载

重点讲解

重点讲解：
1. keep sth. to oneself
把…秘而不宣；不将…说出去；
eg. I have to tell someone. I can't keep it to myself.
我得找人说说Az4s+u|R_yV=*,q!F7r。我心里憋不住7P+)g5qCHej62|。
eg. There's one thing you can do for me. But keep it to yourself.
有件事你能帮我做_P5*hH*fDC)mMIihK=。但你要保密Yu*%Lrb7hS9!jSYEHa(Y。
2. search for
搜寻；搜索；搜查；寻求；
eg. He searched for work at various stores.
他在各家商店寻找工作GR*NnYq-bTg#BR。
eg. He who would search for pearls, must dive deep.
采珍珠的人必得潜入深海~YuDyjgNy@1Uq。
3. believe in
相信有…；认为…存在；
eg. Many African tribes believe in reincarnation.
许多非洲的部落都相信人会转世kuW7MKReEzIle2WRq。
eg. I don't believe in the supernatural.
我不相信超自然现象@08a=#M(xsCZ5S!VO6。