单词	a vein of coal
释义	a vein of coal 煤层
随便看	oral polio vaccine oral poliovirus vaccine oral poliovirus vaccines oral practice oral presentation oral presentations oral primacy oral procedure oral proceedings oral proficiency oral proficiency interview (opi) oral prophylaxis oral prosthetic aesthetics oral public health oral question oral-questioning oral quiz oral quotation oral radiology oral reading oral region oral rehabilitaion oral rehabilitation oral rehydration oral rehydration salts 打铁作门限托何人托兴每不浅扣人难动心扣关无童仆扣舷明月中扣舷歌断扣舷独啸扣门无犬吠执手相看泪眼標本標本調査標札標柱標榜標準標準語標的標示標示