The TV station reported that by completing the swim, the fourth grade student from Losbanios broke a record previously held by a 10-year-old boy.  

电视台报道说，通过完成游泳，来自洛巴尼奥斯的四年级学生打破了以前一个10岁男孩的记录。

that是宾语从句的先行词是代表后半句话吗？by是表示方式通过的意思吗？