1、
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》
2、
3、
4、
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.
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