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词汇 脉冲星
例句 Pulsars emit radiation.脉冲星发出辐射。Some pulsars keep time better than the earth's most accurate clocks.某些脉冲星发送脉冲比地球上最精确的时钟都准时。He recognized that pulsars were the long sought-for neutron stars.他曾确认脉冲星就是苦苦寻找的中子星。
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