Ulf
n. 超低频
🗣️ 情景例句
What's up?
什么事？
No, it isn't. Yes, it is.
不，它不是。 是的，它是。
The Ombudsman immediately wrote to the Chief of Police in the district asking him to send a record of the case.
司法特派员立即写信给当地警察局长，请他寄送与此事有关的材料。