一级理论和二级理论的区别

She was lying on the young man's back. The young man's face was somewhat similar to hers. He also had red lips and white teeth, sharp eyebrows and starry eyes. He had a "spirit" in his body and a slight "movement" between his eyebrows. Although he looked only eleven or twelve years old, But his actual age should be younger, and he has a sense of cleverness all over his body....