Warning: file_put_contents(/www/wwwroot/ppbbu/cp667.com/cache/fc3c9c4661b0f9e23eba299d5b528561.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/cp667.com/index.php on line 55 background counting rate例句_background counting rate英汉例句_background counting rate双解例句_淳朴汉英词典
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。