短語詞組短語pulsar r time scale 脈沖星時標Pulsar World Time Sports Watch 脈沖星世界時間運動手表ensemble pulsar time 綜郃脈沖星時pulsar time application 脈沖星時應(yīng)用pulsar time transfer system 脈沖星時間傳遞系統(tǒng) 返回 pulsar time