美文听写:母亲的意义
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科学60秒:地月水不同 彗星释缘由
The Apollo moon missions ended almost 40 years ago. But for lunar scientists, they're ____1____. Researchers studying rocks brought back by astronauts have found that the moon's scarce water has ...
科学60秒:土星环——卫星的残迹
Galileo first ______1_____ Saturn’s rings 400 years ago. But since then, scientists have ______2_____ how they got there. Because the rings are almost pure water ice—and material in the outer s...
美文听写:Human Life a Poem人生如诗(中)
to adj. 断续的 adv. 不连贯地One should be able to sense the beauty of this rhythm of life,to appreciate,as we do in grand symphonies,its main theme,its strains of conflict and the ...
美文听写:On Motes and Beams微尘与栋梁(上)
s adj. 可憎的,十恶不赦的On Motes and Beams It is curious that our own offenses should seem so much less heinous than the offenses of others. I suppose the reason is that we know...