Headfirst
adv. 头在前
✅ 同义词
🗣️ 情景例句
You had it engraved!
你在上面刻了字！
When would you like to return?
你打算什么时候回来？
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。