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日本科学家最近发明了一种新型捕鼠器。它主要由纸箱和声波发生器组成。该装置能发生一种吸引老鼠的尖叫声,当老鼠接近声源时,真空系
Japanese scientists recently invented a new type of mousetrap. It is mainly composed of cardboard boxes and sound wave generator. The device produces a scream that appeals to rats when the mouse approaches the sound source, the vacuum system