Sparks were emitted from small black boxes and red lamps flashed on and off angrily.

黑色的小盒子里发出火花,红灯刺目地忽亮忽灭.

《用法词典》

The investment banks may be booming but they remain black boxes.

投资银行或许会继续繁荣下去,但它们仍处于暗箱状态.

互联网

Those ads sell black boxes - computerized trading systems.

那些广告在推销黑箱 —— 电脑交易系统.

互联网

Black boxes appeal to beginners who derive a false sense of security from them.

黑箱能吸引新手,新手从黑箱得到了虚假的安全.

互联网