NOTES TO THE TEXT

[1] coal deposit��ú��

[2] reserves������

[3] sedimentary rock basins�����������

[4] seams��ý��

[5] sandstone��ɰ��

[6] shale��ҳ��

[7] exploration����̽

[8] geologist������ѧ��

[9] metric ton������

[10] coalfields��ý��

[11] domestically�����ڣ������أ����õأ����õ�

[12] productive region��������

��һҳ[1][2]