balance jewel hole

• 摆钻孔

balance jewel hole的用法和样例：

例句

1. Using a drill, he bore a hole through the wood.
   他用钻孔机在木头上钻了一个孔。
2. Rescue workers are drilling a hole on the north side of the mine.
   营救人员正在矿北边钻孔。