1 N-COUNT （飞机的）黑匣子，飞行数据记录仪 A black box is an electronic device in an aircraft which records information about its flights. Black boxes are often used to provide evidence about accidents. （飞机的）黑匣子，飞行数据记录仪

2 N-COUNT [usually singular] 黑箱（知道结果但不知道其工作原理的系统或仪器） You can refer to a system or device as a black box when you know that it produces a particular result but you have no understanding of how it works. 黑箱（知道结果但不知道其工作原理的系统或仪器）