MALE PROFESSOR: Well, exclusive care by the male parent is much less common, but it does occur.
MALE PROFESSOR: Now for animals other than birds, the care of young by both parents is pretty unusual in the animal kingdom.
MALE PROFESSOR: Males contribute to parental care in fewer than 5 percent of all mammalian species.
MALE PROFESSOR: It's even less frequent among reptiles.And, exclusive care by the male is very rare
请问老师 这里的in 的用法是什么?还有类似例句吗?