Warning: file_put_contents(/www/wwwroot/zidian/oumou.cn/cache/f6a88d53b8f054eccd4cbb79eca500b8.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/oumou.cn/index.php on line 58 background counting rate是什么意思，background counting rate的翻译，background counting rate音标、读音、用法和例句_歐米惠必应词典
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。