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本听力材料来自于老托partb，partc，是公认实施有效的听写材料，对于上手托福时间不长的同学非常适合。我曾经一次短时间备考听力提高了7分也归功老托。希望大家和我一样一定要坚持下来噢。相信坚持学习的同学听力上都会有很大的飞跃！
Nopain, no gain.我们的安排是这样的，第一遍用听力软件精听材料（建议做单句听写，听写的时候不要偷看我给的挖空题），然后按照我给的挖空题填关键词，回复后即可看到听力原文和文章精解，我将把难点和易错点oneby one 分析给大家。
回复填空答案格式如下：1____2____3____...et.al.
S: This doesn’t have anything to do with the lecture, Dr. Brown. It's just
something I was wondering about.
T: I'm always glad to entertain questions.
S: What I want to know is, with all our space exploration, aren't astronomers
concerned that were polluting space, you know with spacecrafts and satellites?
T: That is an interesting question. Well, first of all, it's important to understand
the space isn’t that ______ as you might think. More than 1000 tons of debris
enters the earth's atmosphere every single day.
S: What? The spacecrafts don't need that much garbage?
T: No, but there are meteoroids entering our atmosphere almost constantly.
You are familiar with what the moon's surface looks like, right?
S: But we don't have these craters on earth. I don't understand.
T: Remember the moon's lack of atmosphere means that even small
______ make craters. But most of the meteoroids that hit the earth's
atmosphere melt or break up in the air.
S: Causing meteorite? The ______ of light we see is that meteoroids breaking
up, isn't it?
T: Yes, and getting back to your question about pollution, that's one way we
could deal with the ______ of satellites and spacecraft. The truth is we do have
a lot of ______ing debris, and traveling at 10 to 20 thousand miles per hour.
S: Really? I wouldn't want to collide with anything going that fast.
T: It's a real danger for spacecraft. But we could dispose the debris by simply
sending it back into the earth's atmosphere.
S: oh, so the debris was just burned up. Well, thanks a lot, Dr. Brown.
