黑盒

Traditional form:

黑盒

Pinyin (reading):

hēihé

Definitions:

• black box
• fig. system whose internal structure is unknown

Characters:

• 黑 - black; dark; evil, sinister
• 盒 - small box or case; casket

Traditional characters:

• 黑 - black; dark; evil, sinister
• 盒 - small box or case; casket