It proves that ...,还是it is proved that...?

It proves that＝It is proved that"结果表明/证明."
1.It is proved that the method has a better effect.
实验表明,该方法不仅简便,而且效果良好.
2.It is proved that the algorithm is fast and reliable.
实例表明,算法运行速度快,稳定可靠.
3.It is proved that the novel roof is waterproof after improvement.改良之后的新奇房顶证明是防水的.
1 Otherwise it only proves that you are also cheating yourself!
否则只能证明你们也在自我欺骗!
2 And it proves again that there are no fans quite like the Dutch.
“橙色风暴”再次证明了没有哪个国家的球迷能和荷兰的球迷相提并论.
3 By case history calculation,it proves that this method is characterized by its simplicity solution principle and covenience in computer programming.
通过实例计算,证明该方法具有解算原理简单,便于计算机编程的特点.