Warning: file_put_contents(/www/wwwroot/ppbbu/73904.com/cache/15591267a77d6a7e8968923411da1099.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/73904.com/index.php on line 55 Shallon例句_Shallon英汉例句_Shallon双解例句_骑士汉英词典
Within the range of workable deepness from the shallon to the bottom,there existed a verticalzonation of bituminous coal from low rank to high rank. 在由浅到深的可采深度范围内，存在着由低级烟煤到高级烟煤构成的垂直分带。