Trephining
[医] 环钻, 环锯
🗣️ 情景例句
Danger.
小心，危险。
The ancient Roman civilization was finally destroyed by the nomadic tribles.
古罗马终于被游牧民族灭亡了。
This morning, however, a firemen accidentally discovered the cause.
然而今天上午，一个消防队员偶然发现了起火的原因。