是an experience还是a experience

such a good experience & so good an experience都对吗? experience是可数还是不可数 much experience还是many experience （an）unusual experience 而不是a An unforgetable experience make it an experience An unforgettable experience文章 以“An unusual experience” An unforgettable Experience. 《A bad experience is an experience as well》翻译成中文 A wonderful experience A travelling experience作文