假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（＼）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1）每处错误及其修改均限一词;
2）只允许修改10处，多者（从第11处起）不计分。
Last Sunday, I tidied up my room and spot my albums. I looked through them, recalling the moment I had experienced ---the best and worse years of my life. I stopped at a picture taking when I had my first football match. I felt such nervous then, because it was the first time that I had asked to play by the coach. Your job was to cooperate with other teammates and cover with the match after it was over. Although we succeeded, I still made several mistakes in the match where almost ruined our chances. When the photographer was taking a picture, everyone had a happy expression, except me. Holding the picture, I laughed. How interesting it was!
、
之间的“直角距离”为
若
到点
、
的“直角距离”相等，其中实
、
满足
、
，则所有满足条件的点
的轨迹的长度之和为( )
