This sentence ends with a metaphor. Using the metaphor of two rabbits running together, it is difficult to distinguish between male and female. It is interesting and unforgettable to skillfully solve the mystery that Mulan disguised as a man instead of her father to join the army for many years.
Annotation translation:
It is said that when the rabbit's ears are hanging in the air, the male rabbit's front feet are always moving, and the female rabbit's eyes are often narrowed, so it is easy to recognize. Pushuo: Describe the fluff on the feet of male rabbits. Blurred: Describe the way the mother rabbit's eyes are covered with fluff.
Two "double rabbits": two rabbits run on the ground together, and they can't tell the male from the female. Walking side by side means running on the ground. The above four sentences praise and affirm Mulan's talent and wisdom through the metaphor that the male rabbit and the female rabbit can't tell each other when running, and convey the concept of "Who says women are not as good as men".