名詞 master copy:

1. an original creation (i.e., an audio recording) from which copies can be made
   同義詞：master, original

1. It controls how data and database are shared among users on the network and how users access master copies of data and application software on the centralized hard disk.
   它控制著網(wǎng)上用戶如何共享數(shù)據(jù)和數(shù)據(jù)庫，以及用戶如何存取中央硬盤上的數(shù)據(jù)和應(yīng)用軟件的主拷備。