高中英语一些句子结构词汇的理解,

题目

高中英语一些句子结构词汇的理解,
He serves as an example to young people around the world to selflessly serve a cause greater than themselves.（主要是后半部分不理解）
As the strong winds are blown against the kites,a string kept them in check.（这里前半句为什么用被动啊?前半句它的结构是怎样的,blow怎么理解呢?）
She gave me a beatifully warpped box.Inside was a gift,the beauty of which multiplies even as it touches me:a necklace to which I can add charms for each stage of my life.（这里的even是表强调吗?后面半句是说＂我可以为项链增色＂还是＂项链给我增色＂.从语法上,我倾向于前一种理解,可是,通过原文,我又觉得情理上,应该为后者.）

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