public-domain software
美
英 
例句
Freeware differs from public domain software in that freeware remains copyrighted while public domain software does not.
免費軟件不同于公共域軟件,免費軟件有版權,而公共域軟件無版權。
For instance: Maintenance of free breakdown of freeware or public domain software of computer knowledge interlocution .
比如:免費的電腦知識問答免費軟件故障維修等。