"No matter, we will pay the difference," Helena said placidly.海伦娜平和地说：“没关系，我们来支付差额。”He died a British prisoner at St. Helena in 1821.他作为英国的囚徒,于1821年死在圣赫勒拿岛.I fear the life of Helena was fully snatched.我怕海伦娜是给人谋害死的....
Keywords: design hyetograph, principal components analysis, cluster analysis.关键词: 设计雨型 、 主成分分析 、 群集分析.Design storm hyetograph is the essential element for hydrologic modeling analysis and storm water drainage design.设计暴雨...