柯林斯词典pulsar /ˈpʌlˌsɑː/ (pulsars) 1. N-COUNT A pulsar is a star that spins very fast and cannot be seen but produces regular radio signals. 脈沖星 返回 pulsar剑桥词典a very small dense (= heavy in relation to its size ) star that sends out radio waves 脈沖星 返回 pulsar