Jackbit
可拆式钻头, 活钻头, 岩心钻头, 凿岩机钎子, 手持式风钻钎子
🗣️ 情景例句
When you learn a new verb, learn its various forms.
学到了新动词时，记住它的各种形式。
No. I've been visiting relatives.
没有，我走亲戚去了。
At exactly that moment, the telephone rang.
恰恰在此时，电话铃响了。