In the 1920s, Swiss psychologist Jean piaget proposed that children's cognitive abilities unfold naturally,like the blooming of a flower, almost independent of what else is happening in their lives.
2015年12月四級真題（第二套）閱讀 Section A
柯林斯高階英漢雙解學習詞典釋義
VERB
展現；呈現；逐漸明朗
If a situation unfolds, it develops and becomes known or understood.