将军命令号手吹号收兵.The general ordered the bugler to sound the retreat.小号手英勇地面对敌人.The little bugler bravely squared up to his enemy.巴里·塔克韦尔 是伦敦交响乐团的主号手.Barry Tuckwell was principal horn with the London Symphony Or - chestra....
英国煤层的平均厚度为1米。The average UK coal seam is one metre thick.他正忙于勘探煤层.He is busy with proving up a coal deposit.煤层的炭化程度取决于温度.The degree of carbonization of coal depends on the temperature....