Você procurou por: bit mask (Inglês - Chinês (simplificado))

bit mask
位元遮罩

mask
面具

edit mask
輸入遮罩

file mask:
文件掩码 ：

& file mask:
文件通配符( f) ：

transparency mask
透明燃烧

directory mask:
目录掩码 ：

& effect mask...
橡皮选择

& subnet mask:
子网掩码( s) ：

the options are a bit mask with one or more of the following:
op_anonymous - dont use or update a .newsrc for news (nntp only)

the optional flags are a bit mask with one or more of the following:
imap_body() returns the body of the message, numbered msg_number in the current mailbox. the optional flags are a bit mask with one or more of the following:

masks
掩码