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.
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。
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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