期权的真正价值不在于其价格,而在于它为持有者提供的灵活性。
Life is not a paragraph, and death is no parenthesis.
The energy industry is not just about extracting resources; it's about powering lives and communities.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
估计问题的性质不同。在这里,我们不关心检验特定的假设,而是关心估计参数的值。
The most beautiful thing a person can experience is the mysterious.