Warning: file_put_contents(/www/wwwroot/ppbbu/80125.cn/cache/01b88b32412972c0534a6f8999bd349e.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/80125.cn/index.php on line 58 background counting rate例句_background counting rate英汉例句_background counting rate双解例句_食材鋪反向词典
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。