Precarburization
预先碳化[渗碳]
🗣️ 情景例句
Amtrak is happy to announce our arrival in New York City.
我们很高兴报告诸位 Amtrak火车就要到达纽约了。
Sleeping is the best cure for waking troubles.
睡眠是良药，专治醒时愁。
I've got three weeks altogether. What do you suggest I see?
我总共有三周时间。你建议我看些什么呢？