求一篇科学小品文 内容是关于沙丁鱼再运回的时候都要放鲶鱼防止死或者关于一个非常大一串生物链的
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![求一篇科学小品文 内容是关于沙丁鱼再运回的时候都要放鲶鱼防止死或者关于一个非常大一串生物链的](/uploads/image/z/7818480-0-0.jpg?t=%E6%B1%82%E4%B8%80%E7%AF%87%E7%A7%91%E5%AD%A6%E5%B0%8F%E5%93%81%E6%96%87+%E5%86%85%E5%AE%B9%E6%98%AF%E5%85%B3%E4%BA%8E%E6%B2%99%E4%B8%81%E9%B1%BC%E5%86%8D%E8%BF%90%E5%9B%9E%E7%9A%84%E6%97%B6%E5%80%99%E9%83%BD%E8%A6%81%E6%94%BE%E9%B2%B6%E9%B1%BC%E9%98%B2%E6%AD%A2%E6%AD%BB%E6%88%96%E8%80%85%E5%85%B3%E4%BA%8E%E4%B8%80%E4%B8%AA%E9%9D%9E%E5%B8%B8%E5%A4%A7%E4%B8%80%E4%B8%B2%E7%94%9F%E7%89%A9%E9%93%BE%E7%9A%84)
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