研究丹顶鹤有助于我们的自然保护.（英文）Studyingred-crownedcranesis()()()()()naturecranes研究丹顶鹤有助于我们的自然保护.（英文）Studyingred-crownedcranesis)(?)(?)(?)(?)naturecranes.

Question

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.

Answer 1

Studying red-crowned cranes is helpful for us to protect
nature cranes.