infantile sexuality

例句：

1. 1. The child's infantile sexuality is evident in his playful interactions with other children.
   这个孩子的婴儿期性欲在他的与别的孩子玩耍时表现出来。
2. 2. Infantile sexuality plays a significant role in the development of young children.
   婴儿期性欲在儿童的发展中起着重要的作用。
3. 3. The research on infantile sexuality has shed light on the early stages of human sexual development.
   关于婴儿期性欲的研究揭示了人类早期性发展的阶段。