手工制造一支这样的枪所需的劳动会耗尽任何普通工匠的耐心和毅力。
The ocean is not just a resource; it's a responsibility.
The power of science lies in its universality and selflessness, transcending the boundaries of nations and cultures.
理解布莱克-斯科尔斯模型的关键在于认识到它是基于对冲以消除风险的理念。