n.去壳；去皮；炮击
动词shell的现在分词形式.
The results showed that the shelling procss had much advantages and that extraction method should be spreaded. 结果表明，去壳加工利大于弊，浸提法制油值得推广。
The enemy lines were weakened by shelling. 敌人的阵线被炮击所削弱。
