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n. 灯泡，球状物1 次
Even before the invention of the electric light bulb, the author produced a remarkable work of speculative fiction that would foreshadow many ethical questions to be raised by technologies yet to come.
甚至在电灯泡发明之前，这位作者就创作出了一部非凡的推想小说，预示了未来技术将会引发的许多伦理问题。