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river terrace
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river terrace
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理学
河流阶地
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river terrace
河流阶地
河流长期交替下切与侧蚀河谷底部,沿河出现一些不再为特大洪水所淹没的条带状阶梯地形。又称河成阶地。
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food safety
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Food Safety Committee of the State Council
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Food Safety Law of the People's Republic of China
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Food Safety Standards of People’s Republic of China
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