Splining
花键加工
🗣️ 情景例句
Yes, I am.
是的，我是。
If you concentrate all your energies on the study of English, you will master the language.
你若全力以赴地学习英语，你会掌握这门语言的。
How long has Jim been at his school?
吉姆到校有多长时间了？