black box

black-box的词性：
n.（名词）

1. A device or theoretical construct with known or specified performance characteristics but unknown or unspecified constituents and means of operation.
黑箱：一种仪器或理论学说，有已知或特定的性能特征但未知或不确定指出的构成成分或操作方法

2. Something that is mysterious, especially as to function.
黑匣子：尤指功能神秘的事物

3. The flight recorder, as on a military or commercial aircraft, that documents preflight checks, in-flight procedures, and the landing.
黑匣子：在军用或民用飞机上，纪录飞行前检查、飞行过程和降落的飞行纪录仪