shell腳本中多個條件判斷的語法

if [ "$content" = "hello" ]\
   || [ "$content" = "kitty" ]
then
    echo "content is hello or kitty"
elif  [ "$content" = "red" ]\
    || [ "$content" = "yellow" ]
then
    echo "content is red or yellow"
fi  

特別注意:"]"和"\"之間無空格