Recarburizing
增碳作用
🗣️ 情景例句
It's here, Robbie.
就在这儿， Robbie。
When the police arrived, I was resting.
当警察来的时候，我在休息。
Sally was very excited because she had never travelled on a train before.
萨莉非常激动，因为她从未乘过火车。