The problem of testing statistical hypotheses is an old one, and its origins are obscure.
检验统计假设的问题由来已久，其起源已不可考。
写作是对人类的一种爱的行为。
"War doesn’t end when the fighting stops; its echoes linger for generations."
有些鸟是注定不会被关在笼子里，因为它们的每一片羽毛都闪耀着自由的光辉。