基本解释[物理學]本底計數率英汉例句雙語例句A high sensitive neutron monitor is described in this paper. It has an approximate counting rate of 20 cpm for natural background neutrons.本文介紹了一種高霛敏度中子監測器，它對天然中子本底的計數率約每分鍾20次計數。background counting rate更多例句词组短语短語background d counting rate 本底計數率background counting rate更多词组专业释义物理學本底計數率