Liberty cannot be preserved without a general knowledge among the people.

亲代投资是理解两性交配策略差异的关键。

我唱歌不是为了完美，而是为了连接。

The challenge of leadership is to be strong, but not rude; be kind, but not weak; be bold, but not bully; be thoughtful, but not lazy; be humble, but not timid; be proud, but not arrogant; have humor, but without folly.

The success of IVF is a testament to the power of collaboration between scientists and clinicians.

写作的行为是对世界混乱的一种抵抗。