Spheroidized cementite
[机] 球状雪明碳铁
🧩 词语组成解析
n. 碳化铁\\n[化] 渗碳体; 碳化铁体
🗣️ 情景例句
Yes, sir.
是的 ，先生。
Don't forget to put stamps on the letter before you mail it.
不要忘记在寄信以前把邮票贴在信封上。
It's very kind of you to help me.
你帮助我真是太好了。