应该两个都可以,以下是字典节选： content  noun-see  also  CONTENT  (contents)  [pl.]  the  things  that  are  contained  in  sth:（事物内部包含的东西）---内容  He  tipped  the  contents  of  the  bag  onto  the  table.◆  Fire  has  caused  severe  damage  to  the  contents  of  the  building.◆  She  hadn't  read  the  letter  and  so  was  unaware  of  its  contents. (contents)  [pl.]  the  different  sections  that  are  contained  in  a  book:（一本书中包含的不同部分）---目录  a  table  of  contents  (=  the  list  at  the  front  of  a  book)  ◆  a  contents  page
content有内容和目录的意思,是哪个意思常用复数?还是两个都常用复数