black box
noun
a flight recorder in an aircraft
(飞机)黑匣子
■any complex piece of equipment, typically a unit in an electronic system, with contents which are mysterious to the user
黑匣设备(指使用者不了解其内部结构的电子设备)

noun
a flight recorder in an aircraft
(飞机)黑匣子
■any complex piece of equipment, typically a unit in an electronic system, with contents which are mysterious to the user
黑匣设备(指使用者不了解其内部结构的电子设备)

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