Root bur
[医] 根钻
🏥 医学释义
牙根钻
🧩 词语组成解析
root
[rut]
n. 根，根源;原因，本质;祖先;[乐]和弦基音;
vt. 使生根;使固定;根源在于;欢呼，喝彩;
vi. 生根;根除;
n. 刺果, 粘附物\\n[医] [牙]钻, 圆头锉
🗣️ 情景例句
If you aren't busy today, how about lunch?
如果你今天有空的话，吃一顿午饭如何？
I didn't hesitate to say it.
我毫不犹豫地把它讲了出来。
Did he say what it was about?
他讲了什么事吗？