a usu electronic device, esp one that can be plugged in or removed as a unit, and the internal mechanism of which is hidden from or mysterious to the user
= flight recorder
| 单词 | black box |
| 释义 | black boxnouna usu electronic device, esp one that can be plugged in or removed as a unit, and the internal mechanism of which is hidden from or mysterious to the user = flight recorder |
| 随便看 |
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