... soil degradation 土壤质量下降 maintain natural ecosystems 维持生态系统 scientific research 科学研究 ...
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Agrochemicals had destroyed the natural cycles of nutrient renewal that intact ecosystems use to maintain themselves.
农用化工产品破坏了原始生态系统赖以生存的营养更新的自然循环。
Conservation of ecosystems and the species within them could help to maintain the natural balances disrupted by recent human activity.
保护生态系统，保护物种将有助于维持自然界的平衡，而这样的平衡已经被近年来的人类活动打破。
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