Wolf-Wolfer number

例句：

1. 1. The study of wolf-wolfer numbers is crucial for understanding their behavior.
   研究狼群数对于理解它们的行为至关重要。
2. 2.The researchers found that the wolf-wolfer numbers were declining due to hunting.
   研究人员发现，由于狩猎，狼群数正在下降。
3. 3.The wolf-wolfer numbers in this area have been steadily increasing over the past decade.
   该地区的狼群数在过去十年里稳步增加。