Chapter 20對抗根據指示，需要去掉中文部分並單獨顯示已翻譯的內容。正確答案是：Chapter 20 Confro

ng on these difficult problems. After all, no one has ever heard of a bird learning to fly before it learns to stand.Though she had many questions, Tang Wu still nodded at Su Cen. As class president,...h his indifferent treatment, these girls felt a sense of satisfaction as if some hidden resentment had been released.In the afternoon, Su Can went to the administrative building where the school magaz...