straight bit

• 一字形钻头,钻

straight bit的用法和样例：

例句

1. He dove straight into the new book and read all night.
   他一头钻进那本新书里，读了个通宵。
2. In drilling an oil well, mud is used to lubricate the cutting bit.
   钻油井时，泥浆被用来润滑钻头。