研究丹顶鹤有助于我们的自然保护.（英文）Studying red-crowned cranes is ()()()()()nature cranes
问题描述：
研究丹顶鹤有助于我们的自然保护.（英文）Studying red-crowned cranes is ()()()()()nature cranes
研究丹顶鹤有助于我们的自然保护.（英文）Studying red-crowned cranes is )(?)(?)(?)(?) nature cranes.
答
Studying red-crowned cranesis helpful for us to protect
nature cranes.