n.省略，缩写，简化，缩写词，略语,[数学]约分,[音乐]略号
A. D. is the abbreviation for " advertisement " .
A. D. 是 advertisement 的缩写.
" Mr " is the abbreviation of " Mister ".
“ Mr ” 是 “ Mister ” 的缩写.
Each Reader's Digest condensed book is an abbreviation of an originally longer work.
《读者文摘》都是较长原著的缩写本.