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Passage 21 Soils There are many different kinds of soils. Different soils have different types of rock and minerals in them than other. Some soils have more water in them than others. Some soils might have more plant and animal material in them, too
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[00:00.00]notation [00:06.15]notation [00:08.03]n. 记号法,表示法,注释 [00:15.21]notation [00:17.09]notorious [00:24.18]notorious [00:26.25]a.臭名昭彰的 [00:34.05]notorious [00:36.12]notwithstanding [00:46.80]notwithstanding [00:49.00]pre
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AGRICULTURE REPORT – January 15, 2002: Growing Wheat By George Grow This is the VOA Special English AGRICULTURE REPORT. Studies show that there will be nine-thousand-million people in the world by t
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19 childrens numerical skills people appear to born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning t
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They may be a little safer here. But the food in the forest is far less nutritious than on the riverbanks. If they want to eat well and avoid wolves this winter, they'll need to keep on moving. As the elk move gradually downwards, they follow the riv
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We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data
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