experience in life 还是 on life 呢

on my life 还是in my life? 英语中说life in campus 还是life on campus? 是in one's life还是on one's life 请问是in our life还是in our lifes呢? in the first day of my life 还是on the first day of my life the memrable experience in my life一分钟英语演讲(大学) describe a special experience that has changed you in life. the most unforgettable experience in my life（100字） 英语翻译作文题：An unforgettable experience in senior one life------ a/an ( ) experience in my life 英语作文 my experience in class还是on class Life is to experience是什么意思