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保护作物
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保护作物
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保护作物
释
nurse crop
保护作物
在建植人工草地时,为抑制田间杂草生长,保护多年生牧草幼苗生长而同期播种的苗期生长快、与杂草竞争力强、生长期短、再生能力弱的作物。又称伴播作物(companion crop)。
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proper maintenance method of photographic lens
proper map
proper mapping
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proper orthochronous Lorentz group
proper orthogonal group
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