研究选用磷酸作粘结剂，使碎磷矿粉粘结成型。

Phosphoric acid was selected as bond to make phosphate rock powder into ball material.

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眼前的一幕使我伤心欲碎，他的状态的确是要多么糟糕就有多么糟。

It hit me again, how bad of a shape he was really in.

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开始全盘、而不是零零碎碎地设计城市生态系统，或许能够使自然生态系统的压力有所缓解。

Beginning to design urban ecosystems holistically rather than piecemeal might alleviate some of the pressure on natural ecosystems.

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