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1. The study of ecology is essential for understanding the balance of nature.
研究生态学对于理解自然界的平衡至关重要。
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2. Ecological stimulation can help plants grow more efficiently.
生态刺激可以帮助植物更有效地生长。
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3. The government has implemented several policies to stimulate economic growth.
政府已经实施了多项政策以刺激经济增长。