提取下面一段话的主要信息，在横线上写出三个关键词。（6分）
去年在南极上空陨落过程中粉碎的一颗流星已经引发了一种理论，即流星尘埃可能在我们的气候系统中发挥了一种隐秘的作用。
最近发表的一份研究报告称，这块岩石估计有1000吨，去年9月3日进入南极上空的高层大气，成为美国国防部卫星红外线眼观察到的一个火球。同空气分子的摩擦使得这块岩石损耗殆尽，变成一片从56公里高空延伸到18公里高空的尘埃云。利用南极地面站的仪器对这片尘埃进行的近距离观察表明，其直径为20微米，比原先估计的流星碎片的体积大了将近1000倍。以前的研究已经表明，火山喷发产生的直径超过1微米的颗粒能对气候产出重大影响。
关键词：
流星尘埃 影响 气候
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| One night I decided to spend some time building a happier and closer relationship with my daughter. For several weeks she had been 1 me to play chess (棋) with her, so I suggested a game and she eagerly 2 . It was a school night, however, and at nine o'clock my daughter asked if I could 3 my moves, because she 4 to go to bed; she had to get up at six in the morning. I 5 she had strict sleeping habits, 6 I thought she ought to be able to 7 some of this strictness. I said to her, " 8 , you can stay up late for once. We're having 9 ." We played on for another fifteen minutes, during which time she looked 10 . Finally she said, "Please, Daddy, do it quickly." "No," I replied. "If you're going to play it 11 , you're going to play it slowly." And so we 12 for another ten minutes, until 13 my daughter burst into tears, and 14 that she was beaten. Clearly I had made 15 . I had started the evening wanting to have a 16 time with my daughter but had 17 my desire to win to become more 18 than my relationship with my daughter. When I was a child, my desire to win 19 me well. As a parent, I 20 that it got in my way. So I had to change. | ||||
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