Topspin
n. <网球>上旋
🗣️ 情景例句
As simple as that.
就这么简单。
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。
I have just heard from my sister, Mary.
我刚收到我妹妹玛丽的一封信。