Quillwort
n. 水韭属
🗣️ 情景例句
To teach a fish how to swim.
孔子面前读诗书，班门弄斧。
Courtesy costs nothing.
谦虚恭敬，不用分文。
Yes, he's on the phone. Is he expecting you?
在家，他在打电话。他是在等你吗？