drill ammunition

例句：

1. 1.The carpenter is drillingholes in the wood for the shelves.
   木匠正在木头上钻孔做架子。
2. 2. The studentsare practicing their English speaking skills in thelanguage lab.
   学生们在语言实验室练习他们的英语口语技能。
3. 3. The engineer used a drill tomake a hole in the wall.
   工程师用钻头在墙上打了一个洞。